Ten-year-olds Claire and Luna are identical twins - and witches. Even though they can cast simple spells (with the supervision of their five-star-witch grandmother, Grandy), and know all sorts of cool magic, unfortunately no special charm can keep their divorced father from deciding to remarry. When he announces his engagement to Fluffy (her real name!), the girls are panicked that he'll move away to Fluffy's native Texas. Claire and Luna throw the problem into the brewing vats, and hope to come up with a good, smart, and tricky solution before the dreaded wedding...