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, the software engineer Peter (Liam Neeson) and the shoe designer Lisa are successful in their career and have been happily married for twenty-five year. 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 cellular and decides to snoop her e-mails and discover 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 relationhip with Lisa without knowing that he is her husband.

 Peter (with Tim Nissen decoration) and Lisa ( Laura the Linney ornaments ) struggling to maintain not less than the marriage of their time already . Peter open his own company, Lisa also very independent , is a successful shoe designer , a typical middle class and live a wealthy and dull life . Lisa new conference dinner , Peter found Lisa some restless , behavior is very strange . The face of questioning, Lisa unexpectedly asked: "Do you believe two people can end their lives together? Can not you hope that there may be others occurred in the relationship between ?" Peter would like to find clues to his wife , extramarital affairs , and trailing Lisa to go to Italy . Where he met a named Ralph ( Antonio Banderas decoration) man , a skill skilled magician . Ralph exactly is Lisa 's lover , but he was before Peter hide very satisfactory .