Chained

Eight year old Tim and his mother Sarah are picked up by Bob, a deranged taxi cab driver on the hunt for his next victim. Tim witnesses his first murder, the murder of his mother, but it would not be his last. Bob keeps Tim as a reluctant protégé, forcing him to clean and bury the bodies of the young women he drags home. Now a teenager, Tim must make a life or death choice between following in Bob's footsteps or breaking free from his captor. (official distributor synopsis)