Cheryl and Jason Blossom are a pair of seemingly normal teenagers in Riverdale. They're wealthy, popular and likeable, but they also harbor a deep, dark secret one of the Blossom Twins is the Anti-Christ. Both want the title, and no one in Riverdale is safe. Taking sibling rivalry to its most infernal limits, the Blossom twins enter into a sinister competition to prove themselves worthy of the throne of Hell. While mild-mannered classmate Betty Cooper is starting to realize what they are up to, making herself a target, a mysterious stranger wanders into town, bringing with him a revelation that will turn Cheryl and Jason's world upside down.