​On a school field trip to the aquarium, Charli meets a marine biologist who rescues sea turtles. Charli can’t stop wondering what it would be like to be a marine biologist herself. Soon, she is lost in a turtle daydream. When she finds a weak sea turtle stranded on the beach, it’s up to Charli and her friends to save him—and to figure out a way to help save all sea turtles!