While attending a meeting as a Chief Inspector of the Public Security Bureau, Akane Tsunemori received a report that an incident had occurred on a foreign vessel , and this was the beginning of a big and unexpected case.
A large scale catastrophe is occurring across the planet. Ability users are discovered after the appearance of a mysterious fog, apparently having committed suicide, so the Armed Detective Agency sets out to investigate these mysterious deaths. The case seems to involve an unknown ability user referred to as "Collector," a man who could be the mastermind behind the incident.
Trust and courage are put to the test in order to save the city of Yokohama and ability users across the world from the grip of Collector where the Armed Detective Agency forms an unlikely partnership with the dangerous Port Mafia.
Ciel learns of a "Aurora Society", that is rumored to be researching how to bring the dead back to life. Their next meeting is scheduled to be conducted on the ship Campania, voyaging across the Atlantic Ocean. Much to Ciel's dismay, Elizabeth "Lizzy" Midford, is taking the same ship, thus leaving him with no choice but to get aboard as well.