Zeus causes a ruckus while living with his parents, Kronos and Rhea, when every time he sneezes or gets mad his lightning shoots out, so they send him to Eureka, a camp where little gods learn to use their supernatural abilities, and with the help of other gods like the wise Athena and the wisecracking Hermes, little Zeus learns to control his own powers and succeed.

When Zeke uses his powers to become a superstar on the youth baseball team, ignoring Harris's concern that this is cheating, their friendship is in trouble.

While on a field trip to an actual Greek city, the Little Olympians overhear a plot for a surprise attack so Hermes must be brave and run through great dangers all the way to Athens and back to get help.

Zeke spends Halloween in his true alien form, but when a jealous classmate decides to stop him from winning the school costume contest, Harris and Roxy must save the day.