Based on a notorious Belgian court case, My Friend, or The Hidden Life of Jules Depraeter follows Jules Depraeter, a charming but manipulative businessman from Ghent who becomes entangled in robbery, fraud and conspiracy. When police discover stolen jewels and securities in the trunk of a garage owner linked to him, a complex investigation unfolds. During the trial, Depraeter attempts to save himself by accusing a respected investigating judge of masterminding the crimes and plotting the murder of his own wife. Told through courtroom scenes and flashbacks, the film gradually reveals a web of lies, corruption and psychological manipulation.

宝琳（多拉·范·德·格伦 Dora van der Groen 饰）是一个形单影只的老太太，独自生活，日常起居全要靠妹妹玛莎（Julienne De Bruyn 饰）来照顾，然而突然有一天，玛莎去世了，宝琳平静的生活彻底被打破了。宝琳还有其他两个亲戚，她们分别是经营着服装店的宝莱特（Ann Petersen 饰）和同丈夫一起在布鲁塞尔生活的塞西尔（Rosemarie Bergmans 饰）。 塞西尔的丈夫阿尔伯特（Idwig Stephane 饰）坚决反对塞西尔将宝琳接到家里照顾，虽然宝莱特也不愿意照顾这个性格古怪挑剔的姐姐，但最终，这份重担还是落到了她的头上。无奈之下，塞西尔只得带着宝琳到处跑，在宝琳不断的惹出各种各样的麻烦之后，她终于决定把她送进福利院。