At Hemlock Heart Academy, science wiz Kazu Decker shows off his skills by creating a humanoid girl named Pandora. But in a world of monsters and mayhem, surviving high school is harder than getting good grades and lessons often turn violent. Fortunately for them, Pandora's stoic nature and seemingly limitless strength, paired with Kazu's luck, knowledge, and friends, get them out of trouble almost as often as they get mixed up in it!

Pandora's run-in with Scarlet Crown agents Strazio and Pia exposes Kazu and their new friends to the dangerous daemon crime world that runs the town. Just as Kazu's scientific prowess helps Milo escape the grip of criminal life, mob leader Tremolo rears his horned head toward Yahgie and challenges him to a rock-off! Pandora, Kazu, and the usual Hemlock Academy crew band together with Yahgie and his devil guitar, Mark Stevenson, for a heavy metal performance of epic proportions!