In Circle, a random selection of 50 strangers are forced to compete in a deadly game. They wake up, standing, on a game board filled with circles and arrows. If they step off their circle, they’re killed by the glowing black ooze in the center of the room. Every two minutes, a drumbeat picks up and one of the strangers is killed. The contestants must figure out the rules of the game if they have any hope of escaping alive.