The Scooby gang has cracked countless mysteries over the years, but they might be faced with their most daunting challenge yet when they discover a plot to set the mythological dog Cerberus loose upon the world. In their fight to save humanity, these four meddlesome kids must revisit the story of how they met their beloved dog and first founded Mystery Inc. In the process, the discover that Scooby Doo's destiny is far greater than any of them could've imagined. "SCOOB!" hits theaters May 15, 2020.