When Leo discovers that his nemesis Trent is rattled by a ghostly Halloween legend, he masterminds a plan for Chase and Adam to use their bionics to stage a haunting at the school. In the process the boys come to fear that the ghostly legend may in fact be real.

When Chase inadvertently causes Adam to shrink down to two inches, it's all fun and games until Adam ends up on Perry's lunch tray. Meanwhile, Bree gets control of the school for a day.