In the highly anticipated movie 'Ghostbusters: Afterlife', Finn Wolfhard plays the role of Trevor, a teenager who moves to a small town with his family and discovers their connection to the original Ghostbusters. The film serves as a direct sequel to the original Ghostbusters movies and brings back the nostalgic charm of the franchise. Finn's performance in 'Ghostbusters: Afterlife' showcases his comedic timing and ability to bring relatable emotions to his character.