Jack explodes after catching Grace smoking pot again and gives her an ultimatum. However, after a particularly trying day, Grace seeks refuge in her old habit and is unprepared for the price she must pay for the one joint. Meanwhile, Bobby tries to help make things better for Jack, both with Courtney and in school, but only succeeds in making things worse. Also, it is revealed how President McCallister became affiliated with a surprising political party.

Grace and Tom's relationship is exposed when a fellow professor catches them kissing in her office. Later in the evening, Peter turns to Grace for advice when he finds out Courtney is having sex with her boyfriend. Meanwhile, Jack's relationship with Katie progresses and in an effort to become popular at school, Bobby and Warren decide to have sleep over and come up with a shocking idea to make the evening memorable.

Missy turns Jack's world upside when she reveals a secret that could change their lives forever. As a result of her actions, Missy is kicked out of her home and turns to Grace for support and guidance. Meanwhile, Bobby surprises Grace by telling her that he would like to be baptized and tries to convince Peter to be his godfather.