The Good Son is a psychological thriller that tells the story of a young boy named Henry Evans (Elijah Wood) who goes to stay with his aunt, Margaret (Joan Allen), and uncle, Lewis (Ian Holm), in their idyllic coastal home. Henry's arrival is met with enthusiasm by his cousin, Elliott (Macaulay Culkin), who is the same age as Henry. Initially, the two boys hit it off immediately, bonding over their shared interests and sense of adventure. However, as the days go by, Elliott begins to exhibit increasingly erratic and disturbing behavior. He becomes obsessed with his uncle's old military medals and starts to show a fascination with explosives and violence. Despite these red flags, Henry is drawn to Elliott's charismatic nature and the two boys grow closer. As Elliott's behavior becomes more and more bizarre, Henry starts to notice that something is amiss. He begins to uncover dark secrets about Elliott's past and his own family's troubled history. Meanwhile, Margaret and Lewis are oblivious to their son's descent into madness, too caught up in their own marital problems and personal struggles. As the tension builds, Henry finds himself trapped between his loyalty to his cousin and his growing sense of unease. He tries to confront Elliott about his behavior, but is met with resistance and hostility. In a shocking climax, Elliott's psychosis reaches a boiling point, leading to a violent and devastating confrontation that will leave only one person standing. The Good Son is a gripping and unsettling thriller that explores the darker side of childhood innocence and the devastating consequences of unchecked madness. With its eerie atmosphere, complex characters, and heart-pumping suspense, this film will keep you on the edge of your seat until the very end.