Nate, David and Brenda take an interesting trip to Vegas for a funeral directors' conference; a baby's death from SIDS stuns the family; and Ruth takes a floral-arrangement class.

Mitzi Huntley arrives back in Nate and David's lives thanks to a comparison-shopping widow. Meanwhile, Ruth's estranged sister Sarah arrives for an unexpected visit. Later, a vodka-fueled family dinner casts a pall over Nate and Brenda's happy news.

Claire seems to be finding some direction in her life, and a newly serious Billy is an unlikely choice to help her. Tensions between Nate and Brenda finally come to a head, while Keith has a problem that threatens everything he has worked towards in his relationship with David.

Keith and David find the reality of a resort vacation different than advertised, Ruth learns the meaning of 'express checkout' during a shopping excursion with Bettina, and Claire gets a lesson in 'sick' art from a new teacher.