In 1692, in the Ipswich Colony of Massachusetts, five families who each possessed a secret supernatural powers finalized a covenant of silence. One family, wanting more, was consequently expelled; and they vanished without any trace. Now the four teenage descendants of the four remaining families are attending the elite Spenser Academy, and continue with their bloodline's mission to keep the more than 300-year-old covenant. When a student is discovered dead after a party, the quartet realizes it's a sign of an old acquaintance's return, who plots to steal their power and threatens to destroy the covenant of silence that has defended their families for hundreds of years.