Hours before her wedding, Lila watches her fiancé drive away with his childhood best friend Sienna—who just announced she's eight weeks pregnant with his baby. But when Lila discovers a suspicious text thread on Sienna's abandoned phone, she realizes the pregnancy might be an elaborate lie designed to destroy her happiness. Racing to confront them at a remote lake house, Lila is ready to expose the conspiracy and save her relationship. Then her estranged sister—missing for four years—walks through the door with a confession that changes everything. Some betrayals run deeper than blood, and the worst lies are the ones we tell ourselves about the people we trust most.