"The Girl On The Train" is a film, based on Paula Hawkins' novel of the same name. The main heroine Rahcel Watson has become an alcoholic, since she divorced her husband. Rachel lost her job months ago, but didn't tell anyone, so she takes the train to New York (or London in book) every day, so her roommate Cathy doesn't suspect anything. On her way to New York she passes by her ex-husband's house, where he lives with his new wife. On her way she also sees a house of "the perfect couple". When she once notices, that the girl from "the perfect couple" is kissing another man, she decides to leave the train and talk to that girl about it.