Breast cancer strikes the Archer family---Sterling has it. "I'm trying to stay positive," he says. "I can beat this." But before surgery, he wants to bond with young Seamus (even though he isn't actually the baby's father) and take a Las Vegas vacation.

When a blizzard causes a power outage during a critical murder investigation, the team finds they must adapt to their low-tech environment in order to prevent a possible biological catastrophe. Elsewhere, Sweets gets a little too interpersonal when Brennan and Booth find themselves trapped in an elevator, while Angela and Hodgins worry over some test results.

Annie organizes a baby shower for Shirley, while Shirley plots to keep Senor Chang out of her life. Meanwhile, Britta is interested in Abed and Troy's new friend, Lukka, who has a dark past.

It's make it or break it for the Parks Department at the Harvest Festival which is full of surprises.