The story of a husband who suspects his wife of adultery, and sets out to track down the other man in her life.
In Cambridge, software engineer Peter (Liam Neeson) and shoe designer Lisa are successful in their careers and have been happily married for twenty-five years. They have an adult daughter, Abigail, and Lisa frequently travels to Milano to do business with the Gianni & Gianni Company. When Lisa is gone, Peter finds a message in her cell phone and decides to snoop her e-mails and discovers in a secret folder named Love that she had a lover, Ralph. Peter travels to Milano and stalks Ralph; he finds that the man plays chess in a bar. Peter gets close to Ralph and discusses his relationship with Lisa without knowing that he is her husband.