It's just an ordinary school day when third graders Lexie and J.P. see an unusual sign on the bulletin board. In silver letters that seem to float on the paper it says: Alien For Rent: Two Gugentocks Per Hour. Definitely weird.

When Lexie and J.P. go looking for aliens, Bruce, the fifth-grade bully, follows them. Before they can find anything, Bruce tries to punch J.P. and Lexie yells, "Somebody stop him!" Then Bruce freezes in mid-swing, glows green, and floats off the ground. What on Earth is happening?

The answer is not actually from Earth. His name is Bork, and Lexie and J.P. find him napping in Lexie's lunchbox. It seems that Lexie has inadvertently rented Bork for the price of two gugentocks -- a.k.a. Twinkles. So he's been carrying out her orders. But the last thing she yelled at Bruce was "You're the baby!" Could Lexie have turned the school bully into a giant baby? Anything is possible when a junk food -- loving alien comes for a visit!