Lautner will play Finn, who has lived his entire life on Incarceron, a savage, futuristic prison society. He meets the daughter of the warden, who is trapped in her own prison, a futuristic world constructed beautifully to look like the 17th Century. She knows nothing of Incarceron except that it exists. She and Finn simultaneously find a crystal key that allows them to communicate and hatch an escape plan for Finn.