The Hypnotist (2012) on Netflix

Plot summary

Detective Inspector Joona Linna is hunting whoever murdered a young woman and her parents, a killer bent on wiping out the whole family. The son, Josef, survived the attack, but he lies comatose in a hospital. The case details he alone can give stay locked away, so Joona turns to Dr. Erik Maria Bark, who treats acute trauma and uses hypnotism, hoping the doctor can reach the unconscious boy. Erik sleeps badly and depends on strong sleeping pills, and his marriage to Simone is troubled. He is suspended from practice, yet he agrees to try, then pulls back when he sees Josef in discomfort.