Ben is transported back to 1879 and the rustic, frontier town of Salvation, where he must take on a deadly outlaw. Magic, Jenn and Ian face a new threat when a curious senator shows up at headquarters asking a lot of questions about the Quantum Leap program. 

Ben leaps into a priest who has been called to assist a family in crisis on Halloween night; as he delves into mysterious and inexplicable events, he's forced to muster all his resources as a scientist before time runs out.