After years of bickering, Penny and Tate have called a truce: they'll play nice. They have to. Their mothers (life-long best friends) need them to be perfect, drama-free daughters when Penny's mother becomes a living liver donor to Tate's mom. Forced to live together as the Moms recover, the girls' truce is essential in keeping everything-their jobs, the house, the finances, the Moms' healing-running smoothly. They've got to let this thing between them go. There's one little hitch: Penny and Tate keep almost kissing. It's just this confusing thing that keeps happening. You know, from time to time. For basically their entire teenaged existence.