The film is based on the best-selling suspense novel "The Long Corridor" by Keigo Higashino. There are countless secrets hidden in the cloister pavilion mansion. After the rich merchant died of illness, a fire murder case that occurred a year ago was revealed, involving the first heir of the estate, that is, the illegitimate son of the deceased, making the distribution of the estate complicated.

Set in the future, the city of Shanghai battle to defend itself against an ongoing attack by an alien force that has attacked and laid siege to numerous cities around the globe in it's quest to harvest a hidden energy only found on earth.