2015 год. Humphrey can't wait to spend the weekend at Heidi's house, because she is planning an adventure--camping in the backyard with some of the girls from class. Humphrey has never spent the night outdoors before. There's star gazing, a s'mores roast, flashlight Morse code, and an expedition to hunt for creepy crawly creatures. But the prank-loving boys next door are determined to prove that the girls are scaredy-cats. Fortunately, Humphrey knows better--and he proves it with a prank of his own!