Nine-year-old Penny Rose has just moved to a new town, and so far the robots she builds herself are her only company. But with just a bit of magic, everything changes: she becomes best friends with Lark, has the chance to join a secret science club, and discovers that her robots are alive. Penny Rose hardly remembers how lonely she used to feel. But then a fateful misstep forces her to choose between the best friend she's always hoped for and the club she's always dreamed of, and in the end, it may be her beloved little robots that pay the price.