The email arrives Sunday night: Do exactly what I say, when I say it, or I will reveal your secret.

On Monday morning, seventh graders Owen, Gemma, Ally, and Todd, who have nothing in common and barely know each other, must work together and follow the instructions of an anonymous blackmailer. None of them want to go along with the blackmailer's instructions, but each of them have a secret they must protect at all costs.

Set during a single day of school, the students race against the clock to complete a disquieting set of tasks, with fast-paced chapters detailing each moment of the day interspersed with a later interview-style recording made by the quartet.