Marty is not your typical under the bed monster. He doesn't live in your closet or in your dreams. He lives in a mailroom where he makes his friends. He loves chocolate and doesn't like to sleep. He wants to show his friends how much he loves them, but he is scared to come out from behind the wall of mailboxes because he is different. Marty decides to write each of his friends a letter, but he falls asleep before he gets the chance to give them their letters. Oh no!