
26‑year‑old Jocelyn Whitman marries much‑older Warren out of gratitude yet lives an unfulfilling married life. During a long‑distance train trip, she shares an upper sleeper bunk with Warren's athletic younger brother Patrick. Drawn by temptation, the two start a forbidden affair right under Warren's nose. They seek secret pleasure while covering up their tracks. As lies pile up and clues emerge, their risky tryst puts Jocelyn's marriage on the edge of collapse.