Mercy makes a deal with Eugene to watch the motel for a week and ends up with more than she bargained for. An attack behind the Sinful Inn leaves her with an unexpected and undesirable guest—Celia Arceneaux who is on a mission to close the motel. And while Eugene is gone, she's determined to take advantage of the situation. But why was Celia prowling around the back of the motel at night? Who knocked her out? And what do they want from the motel office?

Mercy looks for answers while dealing with the motel guests, a personal attack, and Celia's demands... all with some help from her friends Ida Belle, Gertie, and Spencer.