Grace Evans, an overworked New Yorker looking for a total escape from her busy life, books an Airbnb on a ranch in the middle of Wyoming. When she arrives, she's pleasantly surprised to find that the owner is a handsome man by the name of Calvin Wells. But there are things Grace discovers that she's not too pleased about: A lack of cell phone service. A missing woman. And a feeling that something isn't right with the town.

Despite her uneasiness and misgivings from Calvin's friends and family, the two grow close and start to fall for one another. However, as her departure date nears, things between them start to change for the worse. Grace grows wary of Calvin as his infatuation for her seems to turn into obsession. Calvin fears that Grace is hiding something from him.

Told from dual points of view, You Shouldn't Have Come Here is a thrill ride and a cautionary tale of what can go wrong when you open up your house and your heart to a total stranger.