Art Mumby's family holiday to the Asteroid Belt resort of Starcross quickly devolves into a chaotic adventure involving espionage, temporal displacement, and extraterrestrial threats. Art, his sister Myrtle, and their mother seek a relaxing vacation, but Starcross, despite its name, is far from idyllic. They soon encounter French spies, American rebels, and dangerous sea creatures, all while navigating bizarre temporal shifts to prehistoric Mars and the distant future. Art must maintain his composure amidst the escalating absurdity and danger to protect his family and survive the increasingly bizarre circumstances.

The premise of Starcross suggests a fast-paced, humorous adventure that blends science fiction elements with classic spy thriller tropes. The narrative framework, focusing on Art Mumby's perspective as he navigates increasingly outlandish situations, points to a story driven by escalating stakes and comedic misunderstandings. The inclusion of time travel and encounters with alien life forms indicates a broad scope of imaginative world-building. The overall tone appears to be lighthearted and geared towards an audience that enjoys quirky, action-packed tales.