Molly and her family have moved around for years. Every time they think they've found a home, one of the Quirks slips up and sends them packing. The Quirk family, you see, is a bit, well, quirky. Each family member has a magical power that makes them unique, and highly unusual. Mum can control minds; Grandpa twists time; Molly's twin sister Penelope has an all-too-real imagination; and Finn is the naughty little brother - who also happens to be invisible.
Then there's Molly, the most unusual Quirk of all. Molly is completely, and utterly, normal. Molly's greatest desire is to fit in, and she's found the perfect spot: Normal, Michigan. With its chocolate-box houses, welcoming committees and famous town competitions, it seems like just the place for an ordinary new life. But the Quirks aren't known for fitting in - especially in a place like Normal.