Severely injured in an attempted getaway, safe cracker Slippy McGee is taken in by Father De Rance and nursed back to health by Mary Virginia after his leg is amputated. Under the influence of the kindness shown him, Slippy reforms and falls in love with Mary Virginia, although she intends to marry Lawrence Mayne. When George Inglesby attempts to blackmail Mary Virginia into marrying him, Slippy uses his skill one last time to obtain some incriminating letters from a safe.