The first season is set in the human world and focuses on a young girl named Leah Thompson who is friends with a pair of twin genie sisters named Shimmer and Shine. Each day, the genies grant Leah three wishes, but they often make errors. Each episode features Leah working together with the genies to resolve the problems they unintentionally cause, all while keeping Shimmer and Shine a secret from her next door neighbor and best friend Zac. In the second season, the characters are transported to Zahramay Falls, a magical land where Shimmer and Shine live. Leah reveals her genies' existence to Zac, who is given a genie of his own, named Kaz. Shimmer and Shine continue to grant Leah wishes in Zahramay Falls and befriend the sovereign of the land, Princess Samira. The season includes Samira's pet peacock, Roya, Zeta, a villainous sorceress, and Zeta's dragon, Nazboo.