When Luci has an underwater crisis during diving training at space camp, she must conquer her fears if she ever wants to become and astronaut and travel to Mars.

"Dustin arrives at Camp Know Where to navigate the new social hierarchy without the support of his Hawkins adventuring party. While also faced with nerdy bullies, a new menace haunts the young scientists and camp counselors. A mysterious Albert Einstein masked figure with sinister intent arrives to disrupt the serene woodland scene. The solution won't take rocket science, but Dustin will have to get on the same wavelength as Suzie and the other campers...