To be the absolute best scientist in the entire fourth grade, you need to set your sights on something massive: outer space. You desperately want to go to Space Camp to simulate a real mission to Mars, but the camp is incredibly expensive and you have to earn the money yourself. Your brilliant plan is to become a dog walker, which pairs you up with a gigantic, hyperactive Yellow Lab named Lemon Drop. Surviving a walk with this massive dog is hard enough, but dealing with his endless amounts of drool is a whole different challenge. With the help of your best friends, you realize that Lemon Drop's messy slobber is actually the perfect ingredient for a brand-new, highly unusual science experiment. You will have to use all your genius logic to manage the dog, run the tests, and secure your ticket to the stars.