Miles Lewis loves science and sports. But when his teacher announces a class field trip to an ice skating rink to learn about physics, he isn't so excited. He's never ice skated before, and his friend RJ won't let him forget it. RJ even challenges him to a bet: If Miles skates without falling, RJ will put a "Miles is the man" sign on his backpack. But if Miles falls, he has to put one on his that says the same about RJ. Miles can barely focus on the bet, though, because he suspects his beloved Nana has plans to move out of his family's house--and that's just too much to bear. Can he keep his cool with all the pressure from RJ while finding a way to make his grandma stay?