Samson Shillitoe, portrayed by Sean Connery, is a poet whose fervor for his art teeters on the brink of obsession. He resides in New York City's Greenwich Village alongside his devoted companion, Rhoda, a waitress unwaveringly by his side amidst the chaos of life. As Samson grapples with the challenge of discovering his elusive muse, his frustration escalates, spiraling into belligerence and despair.
Exacerbating his troubles is a persistent debt collector chasing after Samson's overdue alimony payments to a previous wife, which casts a shadow of impending arrest over him. This looming threat intensifies his feelings of desperation and hopelessness. Samson's impulsive tendencies come to a head when he lashes out at a police detective accompanying the debt collector, a violent act that only deepens his troubles.
His situation worsens after losing his job as an office cleaner following a disastrous fling involving a secretary, which culminates in a chaotic scene filled with soap suds. Nevertheless, this fleeting moment of passion brings him a modest fee of $200 for a poetry recital dedicated to a women's group—a small reprieve amid his mounting pressures.
Unbeknownst to Samson, Rhoda seeks help from psychiatrist Dr. West, who claims he can cure writer’s block. Rhoda is determined to help her beloved husband overcome his artistic slump and avoid the abyss of suicidal depression. She hands Dr. West the $200 from Samson's poetry recital, and although the doctor is initially reluctant, he feels compelled to assist Shillitoe and persuades him to enter therapy. In an effort to create the necessary space for Samson's artistic resurgence, Dr. West arranges for him to be transferred to a serene sanitarium upstate.
At the sanitarium, another physician, Dr. Menken, becomes intrigued by Samson's tempestuous spirit, viewing it as a chance to test a new surgical method. Deceit rears its head as he misleads Rhoda about the procedure’s safety, despite strong opposition from Dr. West and two fellow doctors, who label it dangerously close to a lobotomy.
In an unexpected twist, Lydia, the wife of the esteemed Dr. West, finds herself in a forbidden liaison with the magnetic Samson. Torn between her desires and the limitations of her marriage, Lydia’s attraction proves irresistible. Their passionate encounters unfold in a therapeutic bath, but their secretive romance is soon uncovered by Dr. West himself.
As tensions rise, Dr. West’s professional integrity is compromised when he publicly opposes Samson’s crucial surgery, motivated by his growing animosity towards the poet who has drawn his wife's affections. Lydia, realizing the implications of the surgery, races to intervene but arrives too late to halt the operation, leaving it unsuccessful and forcing Samson to return to New York defeated.
Amidst this turmoil, Rhoda remains loyal to Samson, even as he is cornered by the repercussions of his past decisions, necessitating a showdown with his ex-wife and the threat of imprisonment. Lydia's timely intervention prevents Samson from physical harm, but her revelation that she intends to leave Dr. West for Samson leaves Rhoda in shock.
The emotional stakes escalate, leading to a climactic confrontation. Samson invites Rhoda to join them in a new, unconventional life, but Lydia recoils in horror and departs into the night. In her absence, Rhoda unveils a surprising secret: she is expecting Samson's child. As anger swells within Samson, he unintentionally strikes Rhoda and spirals into chaos, pursued by an outraged crowd, culminating in an explosive climax.
