Rachelfailed her marriage due to infertility. She was addicted to alcohol all day long. The life she once dreamed of was shattered, and her ex-husband Tomsoon got married. Rachel is very annoyed by a woman named Annaliving together and having children. She pretends to go to work by train every day. In fact, she has been fired because of alcoholism. She often monitors and follows her ex-husband when she has nothing to do.
In the day-to-day, aimless train "journey", she will pass the house where she and her ex-husband once lived, and in the third house next door, the blonde beauty MeganAnd her husband Scott. Rachel imagined the couple as the perfect couple in her mind, sketching out their lives, their jobs, and even their names in her heart, but she didn't understand what each other's real life was like.
Until one day, she saw Megan making out with another man at home on the train. Megan's derailment reminded her of her failed marriage and gradually made her lose control. Soon after Meghan disappeared for no reason, Rachel told her husband Scott about Meghan's derailment, and also involved herself in this case.
