Killed Again, Mr. Detective.

A boy with a famous detective father goes on an adultery investigation on a cruise.

Sakuya comes back to life and identifies his killer.

Sakuya attends an advance screening of Yuriu's new movie.

Sakuya hunts down a suspicious person at the Kowloon Hotel.

The murderer is revealed, with an unexpected twist.

Sakuya arrives at an amusement park where a mysterious Ferris wheel is the scene of a crime.

The solution to the Ferris Wheel mass murder is revealed.

Sakuya and his friends are stranded on an isolated Italian island where a siren lurks.

Harvey was found impaled on the mansion’s ornament, his lower body missing. Who could have slaughtered him? Amidst the storm, a sound like singing echoed—reminiscent of the mythical creature ‘Siren’ that Harvey had been pursuing. The group gasped. In that moment, Luciola was discovered unconscious. When Luciola awoke, he recounted the attack to Sakuya and the others, declaring it the work of the Siren. Listening to Luciola’s account, Sakuya sensed a subtle inconsistency

Sakuya and her group race against the clock to investigate, due to Chardina's ultimatum.