Harley is having a blast crashing a Kaleidoscope Collectors Convention, so of course Batgirl and Supergirl show up to ruin her fun! The three tussle over a particularly unique and fancy kaleidoscope. The barrel twists, a multi-colored light flashes, and suddenly they find themselves in the Middle Ages. The kaleidoscope is a time travel device! Can the trio make it back to when and where they're supposed to be, without tangling the time line? Find out in this action-packed, illustrated chapter book that's perfect for young DC Super Hero fans!