Sonnie, Sweeps and Axyl head to Blacktop Lagoon to spend a day playing at the beach and building sandcastles. But while digging, they uncover a buried chest! Could it be treasure that once belonged to the fearsome pirate BlackBumper? They're going to need teamwork to solve the mystery of who owns the chest - and what’s inside!Follow @NetflixFamily on social and Netflix Jr. on YouTube. And go to NetflixFamily.com to learn more and sign up for our free magazine for kids ages 2-5!You can watch Mighty Monsterwheelies now on Netflix.--CREDITSProduced by Spoke Media for NetflixDirector and Producer: Caroline HamiltonExecutive Producers for Spoke: Alia Tavakolian, Janielle Kastner, and Brigham MosleyExecutive Producers for Netflix: Kristen Khoo and David MarkowitzCoordinating Producer: Tess RyanMix and Sound Design: Sammy Syrett