An adaptation of Jill Smolinski's sophomore novel "The Next Thing on My List", It follows June Parker, a 34-year-old woman whose life changes forever when her new acquaintance from a Weight Watchers meeting dies next to her in a car crash. After finding a list of 20 things her passenger wanted to do before she turned 25, from running a marathon to kissing a stranger, the guilt-ridden June finds new adventures while living out the wishes.