Rachel Watson's life is marked by her daily commute to New York and her painful reminder of her past divorce. As she gazes at her former home, now occupied by her ex-husband and his new family, she becomes fascinated with a seemingly perfect couple, Megan and Scott Hipwell. However, her life takes a shocking turn when she witnesses something disturbing on her daily train ride, only to wake up the next morning with no memory of the night before and a sense of foreboding. When Megan is reported missing, Rachel becomes consumed by the case, driven to uncover the truth about Megan's disappearance and her own mysterious actions from that fateful night.

The Girl on the Train
A person's life unravels as they become embroiled in a mystifying disappearance mystery, amidst their own personal turmoil following a recent divorce.