In the aftermath of the last adventure, only Tristan Merrick is certain of what had occurred to be true, while Charlemagne de la Cabernet and Diana Cambridge are less certain. Nonetheless, in an effort to come to an understanding in what really happened last Halloween, Charlemagne and the kids attend psychotherapy sessions at the local hospital.
However, when Tristan suddenly recalls a traumatic memory from his early childhood during one of these sessions, he quickly becomes obsessed as he starts to question his family origins and where he came from. This obsession takes him and Diana on their own adventure in the form of a road trip as Tristan pursues the truth in who he is and who his parents were, seeking to come home. Meanwhile, Charlemagne as well as other parties chase after Tristan as he recklessly abandons the safety of Allabrese to learn what he wants to know about himself.
Who were Tristan's parents? Is this memory real, or a stain from the last adventure? To what extent will Tristan's emotions drive him in this obsessive journey sourced on a whim, and likewise, to what extent will Diana's emotions exhaust as she stays loyal to Tristan in this seemingly crazed state...?