A brilliant crossword-puzzle editor (Chabert) finds her life turned upside-down when she's pulled into a police hunt after a few of the hints inside her recent puzzles are connected to unsolved crimes. Proving her innocence entails leaving the convenience of her world and dealing together with a challenging police detective (Elliott), perplexing through hints together so as to decode the situation, because the 2 are fish out of water from each other's worlds.