Young Nan was rescued from a shipwreck by a man who becomes her foster father. Years later, when he dies, she moves to a nearby city and unknowingly gets involved with a criminal gang. When the gang attempts and fails to rob wealthy Thomas Carter's home, Nan finally discovers what they are and tells the police all she knows, resulting in the imprisonment of Bad Riley, the gang's leader. Grateful, the Carter family takes Nan into their home, to replace a young daughter who had drowned years before, and the young son, Rev. Robert Carter, begins a romance with her. However, the jailed Riley soon escapes and comes after Nan.