Railway Detective Matthew Horton prefers to keep to himself. Working long hours to protect their high-class passengers takes a toll on him, and he has no life outside of work. Rumors about his party going and womanizing are untrue. His only vice is being married to his job. When a replacement arrives for a sick colleague, his heart is awakened.

Esther Walters is temporarily transferred to a new train route and has been warned to keep her distance from the womanizing detective. When he hauls her into his office after an incident, she is certain her job is on the line. It doesn't take long for Esther to realize the rumors are untrue, and there is far more to her new friend than she's been led to believe.

Can Matthew restore his reputation? When they are forced together, will their relationship become more than mere colleagues?