Arthur is very surprised when Buster doesn't show up to watch Bionic Bunny with him and even more surprised when it turns out that Buster's hanging out with some new friend named Mike. Buster makes Mike sound plenty cool, but Arthur really needs Buster's help with their science project. What's worse is that Arthur keeps asking just who Mike is, but it seems like Buster can only gush about who Mike is, rather than give a straight answer. Arthur begins wonder if Buster isn't his friend anymore.