Twelve-year-old Percy Jackson is about to be kicked out of boarding school...again. No matter how hard he tries, he can't seem to stay out of trouble. But can he really be expected to stand by and watch while a bully picks on his scrawny best friend? Or not defend himself against his pre-algebra teacher when she turns into a monster and tries to kill him? Of course, no one believes Percy about the monster incident; he's not even sure he believes himself.

Riley Oh can't wait to see her sister get initiated into the Gom clan, a powerful lineage of Korean healing witches their family has belonged to for generations. Her sister, Hattie, will earn her Gi bracelet and finally be able to cast spells without adult supervision. Although Riley is desperate to follow in her sister's footsteps when she herself turns 13, she's a saram - a person without magic. Riley was adopted, and despite having memorized every healing spell she's ever heard, she often feels like the odd one out in her family and the gifted community.

Zane Obispo spends every day exploring the sleeping volcano in his backyard. "The Beast", as he calls it, is the one place where he can escape other kids, who make fun of him because he has a limp and walks with a cane. After a plane crashes into The Beast, a mysterious girl named Brooks shows up at Zane's doorstep, insisting that they meet at the volcano, where she will reveal a terrible secret. Zane agrees. Brooks tells him that the volcano is actually a centuries-old prison for the Mayan god of death, whose destiny is directly tied to Zane's.

After angering his father, Zeus, the god Apollo is cast down from Olympus. Weak and disoriented, he lands in New York City as a regular teenage boy. Now, without his godly powers, the 4,000-year-old deity must learn to survive in the modern world until he can somehow find a way to regain Zeus' favor. But Apollo has many enemies - gods, monsters, and mortals who would love to see the former Olympian permanently destroyed.

Fourteen-year-old Renata Santiago is the most powerful godborn of them all, a bruja with a unique combination of DNA. The Mexica blood from her dad's side gives her the ability to manipulate shadows. Her mom Pacific, a Maya goddess, gifted her a magical rope that controls time, and Ren recently used it to save a few gods from getting stuck forever in 1987. She brought them back to the present, but her BFF Ah Puch, the once fearsome god of death, darkness, and destruction, is now a teenager with no divine powers.