The story follows a recent divorcee who spends her daily commute fantasizing about a seemingly perfect couple who live in a house that her train passes daily, but something shocking happens there one day.
Luisa has a habit of bringing her dates home, irritating her son, Cesar. When Cesar invites his best friend Pablo over for a sleepover, Luisa's flirtations become too much to bear, especially as Cesar has his own feelings towards Pablo.
Loving girlfriend, family fortune, breakout movie role he's got it all. Until an app awakens a powerful new yearning. While in Rome to shoot his first movie, Niccolò becomes obsessed and sent into a self-destructive spiral.