Michael needs a change in his life, so when he hears about clinical trials for a new anti-depressant, he signs up to be a guinea pig - without telling his family. Because of dangerous side effects, the trial is subsequently abandoned but Michael continues to take the pills. Having lost all control, Michael's repressed instincts resurface with a force and violence that no-one could have predicted.

Michael needs a change in his life, so when he hears about clinical trials for a new anti-depressant, he signs up to be a guinea pig - without telling his family. Because of dangerous side effects, the trial is subsequently abandoned but Michael continues to take the pills. Having lost all control, Michael's repressed instincts resurface with a force and violence that no-one could have predicted.