Aspiring rockstar Zadie Drake's world flipped upside-down the moment her mom started dating Lloyd Clutterbuck--a boring risk analyst with an aversion to all things fun. Since Lloyd moved in, he's made it his mission to drain every drop of joy from Zadie's life--putting strict limits on her guitar sessions, nitpicking her every move, and filling the house with his utter dullness. Naturally, when Zadie's daredevil park ranger dad invites Zadie and her older sister to spend the summer at his cabin, Zadie can hardly contain her excitement. But Zadie's joy is short-lived when her mom announces that Lloyd will be tagging along.

Soon after arriving at the cabin, Zadie begins to suspect that there's more to her dad's job than meets the eye. Her suspicions are confirmed when family secrets make an explosive entrance in the form of a fire-wielding poacher who kidnaps her dad's best friend--an enormous, ice-breathing dragon. The revelations launch Zadie and her family into a cross-country rescue mission of epic proportions. As tensions spike, tempers flare, and the family's differences become glaringly obvious, Zadie realizes her family's most daunting challenge might not be rescuing the dragon but working together.