At her grandmother's seventy-fifth birthday party, Ivy is in no mood to socialize. Unfortunately, sixteen-year-old Lucan's peanut-allergy reaction happens right in front of her eyes. As Ivy keeps him company, the two realize they're second cousins who haven't seen each other in six years due to a mysterious family feud. As the weeks pass, Lucan's and Ivy's summer seems more like a minefield of disastrous events--but at least they have their developing friendship with each other to count on. Or is that what's really going on?