The Devil: A Tragedy of the Heart and Conscience

In Short

Novelized from Ferenc Molnar’s stage play, this melodrama follows Karl Mahler, an ambitious Viennese painter, and Olga Hofmann, his former childhood sweetheart who is now married to a wealthy banker. When Karl is commissioned to paint Olga’s portrait, the mysterious Dr. Millar—a cynical incarnation of the Devil—appears in the studio. Over the course of twenty-four hours, Millar uses insinuation, psychological mind games, and jealousy to push the former lovers toward adultery. Though the sinister visitor drives both characters to the brink of moral collapse, they ultimately conquer their passions, destroy a dangerous love letter, and embrace their duties.

The Story

The drama unfolds entirely within twenty-four hours in Vienna, starting in the studio of artist Karl Mahler. Karl is visited by his childhood sweetheart, Olga Hofmann, and her husband, Herman, a wealthy banker who has commissioned Karl to paint Olga’s portrait. Years earlier, Karl and Olga shared a innocent boy-and-girl affection before Karl studied in Paris and Olga married Herman. Though both pretend that their youthful affection has completely faded, underlying tensions remain, particularly as Olga has arranged for Karl to marry a rich heiress named Elsa Berg.

After Herman leaves the studio, an uninvited guest emerges from a large chair. Calling himself Dr. Millar, this mysterious figure is the Devil in human disguise. Millar immediately begins casting cynical insinuations, accusing Karl and Olga of harboring secret passions for each other and mocking their attempts to maintain propriety. He subtly manipulates their doubts, orchestrating situations to test their moral resolve. He forces his way onto the guest list for a grand ball given that evening at the Hofmanns' residence, promising Herman valuable financial information regarding the Russian wheat crop.

At the ball, Millar’s psychological game intensifies. He manipulates Karl into believing that Olga is having a scandalous affair with him, while simultaneously provoking Olga's jealousy by orchestrating interactions between Karl and Elsa. He urges Karl to claim the woman he secretly desires, treating moral boundaries as mere social hypocrisies. Under Millar's poisonous influence, Karl drops his professional restraint and confesses his hidden, explosive love for Olga, while Olga finds her carefully built resolve crumbling. When Millar suggests a scandalous scheme involving Olga wearing an opera cloak over her bare shoulders in front of the ball guests, Karl erupts in rage, defending Olga's honor and nearly attacking the intruder.

Later that night, the torment continues. In a desperate moment of vulnerability, Olga writes a passionate letter confessing her love to Karl and leaves it in Millar's hands to deliver. However, as morning arrives at Karl's studio, the former lovers confront the reality of their weakness. Although Millar lies and claims Karl has already read the letter, the actual document is returned unopened. Realizing the abyss they almost fell into, Karl and Olga face their true feelings sanely. Together, they burn the love letter, reducing their illicit passion to ashes. Renouncing their forbidden desires, Olga guides Karl toward making amends and building a proper future with Elsa.

How It Unfolds

The past revisited Herman Hofmann brings his wife Olga to the studio of artist Karl Mahler for a portrait sitting. Surrounded by the memories of their youthful love, Karl and Olga attempt to convince themselves that their past affection has faded into safe, respectable friendship.

An uninvited guest A strange gentleman calling himself Dr. Millar appears unexpectedly in the studio, using sharp insolence and cynical observations to break down the pair's polite facade. He manipulates his way into an invitation to the Hofmanns' upcoming ball by offering Herman insider news on wheat prices.

Seeds of jealousy At the evening gala, Millar works to undermine every relationship present, stirring up jealousy between Karl and his prospective bride Elsa. He drives Karl to dynamic outbursts of passion while mocking the hypocrisies of society and marriage.

The temptation peaks Millar pushes Karl to the brink of violence by falsely claiming that Olga has yielded to a wild, reckless scheme. Enraged and desperate to protect Olga's reputation, Karl publicly declares his hidden love for her and turns on Millar.

The morning after Haunted by the night's events, Karl prepares to abandon his studio for Paris, while Olga arrives seeking to retrieve a compromising love letter she gave to Millar. Millar falsely claims the letter was already read, attempting a final psychological triumph over their spirits.

Ashes and duty The missing letter is revealed to be unopened, allowing Karl and Olga to see the trap they escaped. They burn the confession together, resolving to act with honor and return to their proper duties.

The People

• Karl Mahler: A talented Viennese painter caught between professional ambition and lingering passion. Though engaged to a wealthy heiress, his dormant love for Olga resurfaces under demonic pressure, driving him to moments of furious jealousy and despair before he chooses honor.
• Olga Hofmann: A beautiful, socially prominent woman who prides herself on marital loyalty and duty. Beneath her proper exterior lies an unacknowledged love for Karl, which she desperately tries to deny until forced to confront her true feelings.
• Dr. Millar (The Devil): A suave, cynical mastermind traveling incognito who takes pleasure in exposing human weakness. He uses psychological manipulation, financial secrets, and relentless temptation to drive ordinary people toward moral ruin.
• Herman Hofmann: A wealthy banker focused on business, investments, and social standing. Unaware of the emotional drama unfolding around him, his trust in both his wife and Karl makes him an easy target for Millar's calculated financial advice.
• Elsa Berg: A wealthy, fiery young heiress arranged to marry Karl. She is sensitive to Karl's emotional detachment and refuses to be used as a pawn in other people's romantic schemes.
• Mimi: Karl's artists' model who harbors a unrequited affection for him and provides a stark contrast to the high-society world of the Hofmanns.

In Its Own Voice

When Karl attempts to downplay his social standing relative to Olga's, Dr. Millar dismisses his reservations with characteristic cynicism.

"No woman is above her own heart."

Inside the studio, Dr. Millar observes the emotional turmoil he has ignited, taunting Karl about the simplicity of taking what he desires.

"Just stretch out your hand, my boy, and you have your warmth, your happiness, your joy, unspeakable joy, the most supreme joy possible to a human being, and you are too lazy to reach out your hand."

In a moment of quiet reflection before the fire, Olga comes to terms with the end of her illicit romantic desires.

"That is our love begun and ended, Karl."

What It's Really About

The narrative centers on the psychological conflict between duty and suppressed desire. It explores how easily civilized morality, societal conventions, and personal honor can be eroded when exposed to relentless temptation. Dr. Millar does not force his victims into sin through physical power; instead, he merely exposes the unspoken thoughts and hidden weaknesses already residing within the human heart. The story presents temptation as a slow, seductive process where small compromises lead toward spiritual ruin. Ultimately, it argues that human beings possess the free will to reject their destructive impulses. True strength lies not in pretending to be immune to evil, but in actively choosing honor, self-sacrifice, and restraint when brought to the edge of the abyss.

Why Read It Today

Readers who enjoy dramatic, atmospheric Victorian and Edwardian morality tales will appreciate this fast-paced adaptation of Ferenc Molnar's famous stage play. The entire plot unfolds over twenty-four hours, giving the narrative a compressed, theatrical tension that feels like a chamber drama. It captures the luxurious yet claustrophobic atmosphere of turn-of-the-century Viennese high society, where rigid social codes clash with intense personal desires.

Modern readers should be prepared for the dramatic conventions of early 20th-century literature, including sensational dialogue, pronounced melodrama, and overt moralizing—particularly in the foreword and commentary framing the text. However, the story remains remarkably engaging due to the psychological sparring between Dr. Millar and his targets. The Devil is portrayed not as a grotesque monster, but as a witty, sharp-tongued manipulator whose clever observations about human nature still land with precision. It is an entertaining, quick read for anyone fascinated by classic tales of temptation, psychological mind games, and moral redemption.