Undercover Down UnderMary-Kate and Ashley Parker are hanging out, trying to think of a way to become popular -- when a jewel thief trips over their feet! They've stopped a major crime! That's the good news. The bad news is, now the Parker family has to move to Australia to get away from the thieves!Australia is great...at first. The girls' plan works, and soon they're part of the popular crowd. But now they've got two problems. One: The boys they really like aren't part of the in crowd. Two: The jewel thieves have tracked them down -- and they want revenge!