It starts with a spirit-like being called Hyoki possessing a dog and multiple people before defending a girl named Julee against a Slitterhead.

After discovering that Night Owl has the ability to transfer knowledge and memories back in time, they start fighting major Slitterheads and recruiting other Rarities.

Night Owl then remembers he brought back a device similar to a mystic seal in case he encountered a foe he couldn't beat.

A post credits scene shows a possessed Alex driving off, with a message saying that the fight will continue into the next era.

[7][8] In a September 2024 interview, Toyama mentioned that the game is based on the former Kowloon Walled City, although he made travels to Hong Kong to do on-site research.

[9] For designing the Slitterheads, Toyama credits Gantz, Parasyte, and Tokyo Ghoul alongside actual Chinese supernatural creatures like the Yegouzi.

[15] Tristan Ogilvie of IGN praised the game’s unique body-swapping mechanics and blood-based combat, but criticized it for repetitive missions, limited enemy variety, and a shallow story that overstayed its welcome.