Twelve-year-old Piper, the daughter of inventive clockmakers, discovers that her parents are in danger and that a mysterious book of equations may hold the key to saving them. When Raisa and Lev arrive from another world through a portal, their paths intersect as they search for the same book. Together, Piper and Raisa journey across the multiverse, confronting challenges that help them understand their identities and the meaning of home.
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