Grace's father and Will's mother end up making a surprising and upsetting connection. Jack rebounds from his breakup with a new love. Karen must decide between her husband and her lover.

Will convinces Grace that her boyfriend, Noah, isn't in the wrong by refusing to let her meet his daughter, Katie. When Grace goes to apologize to Noah, she unintentionally meets Katie. Meanwhile, Will's mom, Marilyn, visits after the death of her beloved dog, and becomes upset when she doesn't get the emotional support she expects from her son. And Jack gets into an argument with his rec center boss, Theo.

After her dad, Martin, is rushed to the hospital, Grace is shocked when he refuses a transfusion of Will's blood. Will's mom, Marilyn, uncharacteristically takes Martin to task. Karen's demands cause Jack to uninvite her to his wedding.

Worried about Grace being a single mother, Marilyn goes behind Grace’s back to fix her up with a beagle-breeding couple interested in adopting Grace’s baby. Will gets enlisted by Karen to deal with a P.R. nightmare created by a homophobic player on her baseball team. Jack and his husband, Estefan, go to extreme lengths to get rid of a mouse.