While investigating a cruise ship, Sakuya Outsuki learns of a tragedy that shouldn’t have been possible: His own father, the legendary Immortal Detective, is dead! If that wasn’t bad enough, all the sleuths working for his dad have leftft as well. To protect his father’s agency—and ensure they have a home to return to—Sakuya and his assistant, Lilithea, must truly work as one. In this fifinal volume, can they solve the murder mystery at the perplexing Kowloon’s Hotel?