Pepper and Jake, sister and brother shepherds, match wits with the giant, Urk, who regularly floods their valley with his dirty washwater.

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle.

Sixth-grader Ruth Mudd-Flaherty hasn't yet found her place at Humberboldt Middle School, at least that's how her moms see it. She prefers to be a lone wolf now that her very best friend, Charlotte Diamond, has moved on to a new, more socially acceptable group of friends. Ruth has been spending most of her time at the public library studying words for their school's upcoming spelling bee. She just knows that winning the bee will make people see her...

Flying horses from the Royal Guard arrive in Crystal Cove to deliver a message for Sasha, but in order to open it she must first solve a riddle, which requires her to find the petals of rare and different-colored flowers.