The Magic Sitters are becoming increasingly well-known in Sorledo. So, when a new assignment comes through the window, the four friends quickly get to work. This time, they're requested to babysit some kids at the Dark Creatures Conference, and they're not going to let them down. But Sam, a witch with a unique personality, is more nervous than ever. Her twin sister will also be at the conference, and they don't always get along. Will their magic be enough to make it through this adventure successfully?