After being diagnosed with melanoma, Cathy decides to build a pool in her backyard, much to the chagrin of her older curmudgeonly neighbor, Marlene. Cathy's son, Adam, plays pranks on her while her husband Paul tries to get back in her good graces. Cathy also tries to reconnect with her willfully homeless brother Sean, and devises a weight-loss plan for Andrea, one of her summer school students.

When Cathy's attempt to connect to the people closest to her fails, she signs up for a well-meaning but overbearing cancer support group. Adam rebuffs Cathy's attempts to connect with him, so she decides to put together a dinner party with Andrea, Sean and Daphne. Meanwhile, Paul tries to win back his wife's love with an elaborately romantic gesture. Marlene discovers Cathy's cancer secret in a most unusual way.