Using intimate footage recorded by passengers and crew, The Last Cruise is a first-person account of the nightmare that transpired aboard the ill-fated Diamond Princess cruise ship, which set sail from Japan on the earliest days of the COVID-19 pandemic.

A troubled nun attempts to confront the haunts of her past by visiting a former flame in a distant city. Along the way she stops in a desolate river town to retrieve an item from a storage facility and finds herself trapped after hours in the partially renovated old building.