Monster High 2 follows Clawdeen Wolf, Draculaura and Frankie Stein as they enter sophomore year at Monster High. The power of three is put to the test as they face even bigger challenges this year: new students, new powers, evolving friendships, and an even bigger threat that could not only tear their friendship apart, but could change the world forever.

Clawdeen Wolf, half human and half werewolf, has recently started attending Monster High, a school for monsters in all forms. After quickly befriending her classmates Frankie Stein and Draculaura, Clawdeen feels like she has finally found a place where she can truly be herself, or so she thinks. Soon, a devious plan to destroy Monster High threatens to reveal her real identity and Clawdeen must learn to embrace her true monster heart before it's too late.

Mega pop star, Fancy G (Ashanti), hosts a contest to find the next big solo artist. But the young contestants realize they are "better together" and secretly form a band called Honey Girls and become a huge hit cloaked in mystery.

John Gregory, who is a seventh son of a seventh son and also the local spook, has protected the country from witches, boggarts, ghouls and all manner of things that go bump in the night. However John is not young anymore, and has been seeking an apprentice to carry on his trade. Most have failed to survive. The last hope is a young farmer's son named Thomas Ward. Will he survive the training to become the spook that so many others couldn't?