Teenaged June grapples with obsessive-compulsive disorder regularly, but on this particularly important day at school, her intrusive thoughts spiral out of control. As her anxiety intensifies, she turns to her older sister, Melanie, for support. Together, they race against time, trying to manage the overwhelming fear that these thoughts might be more than just her mind playing tricks - threatening to unravel their lives and relationships. Through their journey, June and Melanie must confront both the chaos of OCD and the strength of their sisterly bond.