Don't Tell, Don't Tell, Don't Tell

Frederick has a lot of rules for himself—like if someone calls him Freddy, he doesn't have to answer them, and he only wears shirts with buttons. But when his friend Angel—his only friend—goes missing and he is questioned by the police, he doesn't have a rule for that. Friendship is a new concept for Frederick, so when Angel asked him to keep a secret no matter what, he agreed. But do the rules of friendship apply when your friend is missing?