In the serene landscape of the French Riviera, an American housewife named Kay Stanton lives with her psychologist husband, Neil, and their young son Timmy. Neil frequently travels for work, leaving Kay feeling isolated and lonely. During one of Neil's absences, Kay strikes up a friendship with a charming young American sailor, Mark Dominic, who is stationed nearby. Their platonic relationship quickly transforms into a romantic affair, filled with passion but also turmoil. Kay finds herself conflicted, as she genuinely loves Neil but is irresistibly drawn to Mark, complicating her emotions and sense of loyalty.

One evening, during a heated encounter, something tragic occurs between Kay and Mark, forcing her into a situation fraught with panic and desperation. Consumed with fear of the repercussions, Kay frantically seeks advice and assistance from her neighbor Barbara Collier, who becomes unwittingly entangled in the unfolding drama. As tensions escalate, questions arise about truth, perception, and misunderstanding amid the tightly woven secrets. The quiet calm of the Riviera is disturbed as events spiral out of control, threatening to unravel Kay’s carefully balanced life. As relationships teeter on the brink of ruin and moral dilemmas loom large, the path forward becomes increasingly unclear for all involved.