Years ago, struggling art student Anna Green married a fellow student largely for practical reasons -- access to subsidized campus housing -- and assumed the arrangement quietly dissolved after graduation. She has since been living paycheck to paycheck as an artist, while her erstwhile husband, Liam Weston, has become a professor and, it turns out, heir to an enormous family-owned food conglomerate. The catch surfaces when he reappears: an old clause in his grandfather's will means he cannot claim his inheritance unless he has been happily married for five years -- and the two were never actually divorced. He asks Anna to keep up the appearance of a real marriage a little longer, which means accompanying him to a lavish destination wedding on a private island, surrounded by his wealthy, scheming, and frequently cruel relatives. Forced into close quarters and constant performance for a watchful family, the mismatched pair must navigate corporate power plays, family resentments, and the demands of selling a convincing love story -- as the line between the role Anna agreed to play and what she actually feels grows harder to hold.