At the Tennessee Aquarium, Francis meets a giant octopus suffering from harmful chemicals that have leeched from a rock feature. To save the octopus, Francis must turn to Jose to build all-new aquarium rocks, all while avoiding the Tank Boss, Mat, who has demanded that the warehouse work on his pet project... or else! Its a warehouse showdown as Mats pet project takes center stage while Jose is racing to save an octopus life.