Hide and Seek

"What a weird joke to pull on someone. After all, who would just leave a 13-year-old in a house by himself? That didn't make any sense. Nonetheless, he read, and reread the letter over and over again. Still a joke. So why were his hands shaking?". / After Henry is abandoned and left in the care of Captain Man, it may turn out that they are both the family they needed. AU.