Adam Chaplin (2011) on Netflix

Plot summary

His life was torn apart when his wife was murdered by Mafia boss Denny. Filled with vengeance, Adam summoned a demon that endowed him with god-like strength so that he might survive his journey through Heaven's Valley.

—Steve Jones

Following the suspicious death of his wife, Adam investigates her murder and discovers mafia boss Denny, is involved. Unable to trust the corrupt police, Adam summons a demon who offers him superhuman strength, dark powers, and promises to lead him to the murderer if he does everything the demon asks.

—Anonymous

Set in the fictional country of Heaven Valley, the film tells the story of Adam, a man who begins to investigate the suspicious death of his wife and uncovers the involvement of local mafia boss Denny Richards. Unable to trust the deeply corrupt police department, Adam fuelled by anger, summons a demon who promises him superhuman strength and dark powers beyond imagination. Promising to lead Adam to the murderer if he does all that is asked of him, the demon accompanies the man on his quest for vengeance, unleashing a bloody war that will bring Adam and the demon head to head with Denny and his sadistic sons Ben and Derek, alongside the crooked police and a brutal hired killer. The fight will begin, and it will be the most extreme that you have ever seen.