Matt Sullivan's last big relationship ended in disaster and ever since his heart's been aching and his commitment's been lacking. Then came Lent, that time of year when everybody gives something up. That's when Matt decides to go where no man's gone before and make a vow: No sex. Whatsoever. For 40 straight days. At first he has everything under control. That is until the woman of his dreams, Erica, walks into his life.

When Father Joseph Hennessey visits the home of one of his parishioners to offer last rights,he becomes embroiled in a plot which ultimately shakes his faith to its very foundation. Intrigued by the dying man's mention of "Nim," and fascinated by the man's saintly demeanor, Father Joseph's curiosity is redoubled when a beautiful young woman enters his church to question the young priest about the deceased man. Father Joseph and the woman, whom he discovers to be the "Nim" in question, embark upon an investigation into the circumstances surrounding the man's death.