Professor Layton has been missing for many years, but now, as everyone else has given up all hope of finding him, Katrielle has found a potential lead amongst his possessions. But her next move is crucial - for not only does it impact her life, but those of everyone she knows and loves...

After the Gate takes him in exchange for his brother, Edward is surprised to wake up in the middle of an abandoned warehouse. Unfortunately, gaining the unwanted attention of a certain Black Organisation in the process. In order to find his way home, Edward must survive Murder Cases, Kidnappings and more... while keeping his real identity hidden from a bunch of nosy detectives.