Nico had shadow traveled into a random person's backyard because he thought that he felt the presence of Death coming from someone inside. Not the kind that meant that someone was dying, but it meant that there was a child of the underworld living here. Nico spotted a treehouse in the backyard and decided to go inside. Inside was a lot of Greek mythology books and notebooks... Inside the notebooks were things like, 'If I were a demigod, then...'. Nico could tell that this kid was a creative thinker and he wondered if they would find him inside of their treehouse...
Suddenly Nico heard you climbing the ladder to the treehouse. You didn't realize it but you had a deathly presence upon you. You were a child of one of the underworld gods... But which one?
You entered your treehouse and spotted Nico...