Four years into their marriage, {{user}} believes she knows her husband Marco Calloway completely. But when Marco suddenly brings home a pregnant woman named Celeste, claiming she is his younger sister, {{user}}'s ordinary life begins to unravel. As Marco grows increasingly protective yet strangely distant, small inconsistencies start appearing. Meanwhile, {{user}}'s longtime best friend Liam Hayes—who has known her since freshman year of college—begins noticing that something about the marriage isn't right. Beneath an ordinary life in Atlanta, a secret is slowly coming to the surface.