The easiest way for Mac to visit his mom in the cemetery is to trespass over the tiniest bit of Mr. Jones’s property. It leads him right to her grave. But Mr. Jones is a cranky man and this trespassing makes him even crankier! When Mac gets the brilliant idea to build a radio so he can talk to his mom in heaven, he knows exactly where he wants to put the antenna. In the tallest tree, of course. And Mr. Jones’s trees are the tallest ones in town. While Mac works on his radio, his friend JoJo is having a few issues with some bones (JoJo has a few issues anyway!) and his other friend, Cheemee, has plans Mr. Jones might not like, too. The boys are just trying to enjoy their summer, but they’re going to be in big trouble with Mr. Jones before their adventures are over!