Potato discovers an algae bloom caused by excess nutrients from a neighbor’s compost. With Rocket Pants’ help, they identify the issue and educate the neighbors on preventing future pollution. They then meet Spencer West, a world change warrior, who shares inspiring stories about overcoming obstacles and working with others to create positive change. Spencer motivates Potato and Frittata to tackle the algae problem with help from their duck friends. In the end, they travel back to 2023 to learn how an art club spreads awareness about water pollution through creative sidewalk paintings.