After witnessing the brutal murder of his family, Jack Brooks is left with an unquenchable fury that he is constantly fighting to control. Now working as a local plumber and struggling in a relationship with his girlfriend Eve, Jack’s life has become a downward spiral. One night, Jack attempts to fix Professor Crowley’s old, rusted pipes, but unknowingly awakens an ancient evil. Lured by this demonic power, Professor Crowley discovers a monstrous black heart that quickly forces its way inside of him. Possessed by the heart now beating in his chest, the Professor starts a slow, gruesome transformation. It is at this moment that Jack realizes he can’t run from his past, and quickly discovers the true purpose of his inner rage.