In town for a job interview, a young woman arrives at her Airbnb late at night only to find that it has been mistakenly double-booked and a strange man is already staying there. Against her better judgement, she decides to stay the night anyway, but soon discovers that there is much more to be afraid of in the house than the other house guest.

Pakistan-born comedian Kumail Nanjiani and grad student Emily Gardner fall in love but struggle as their cultures clash. When Emily contracts a mysterious illness, Kumail finds himself forced to face her feisty parents, his family's expectations, and his true feelings.