A "perfect" group camping trip, obsessively organized by Kathryn McSorley-Jodell (Jennifer Garner) in honor of her adoring husband Walt's (David Tennant) 45th birthday, is threatened by tension between Kathryn and her estranged best friend, Nina-Joy (Janicza Bravo), the unexpected addition of a pissed-off goth teen (Cheyenne Haynes) and the chaotic arrival of Miguel (Arturo Del Puerto), who is smack dab in the middle of a breakdown and toting his new girlfriend, Jandice (Juliette Lewis), a woman of many talents who rubs Kathryn the wrong way.