In modern London, England, Victor Kordaus, a young man who wanted to become a detective, accidentally traveled to London in 1920 when he was looking for a book called "The Boy of Truth" in the basement library of his home. Here he met his "great-grandfather" Duke Kordaus, and learned about the existence of the 12 sacred objects of truth and the door of truth. In order to return to modern times, Victor made a group of like-minded friends in this era and formed the Truth Detective Agency. As the true identity of "Sean" was revealed, Nat also became suspicious of Lana's identity. At the same time, the mysterious Sun God Church suddenly appeared and took away Victor. In order to find the Holy Grail of the Abyss as soon as possible, Victor volunteered to stay and confront the church. He unexpectedly learned Edwin's true identity from the church's huge conspiracy.
Purpose: Always seek your own truth on the way to investigate and become the next Sherlock Holmes.