When William (Ralph Ineson) and his family got banished from the Puritan Plymouth Colony because of disputes over beliefs, they were forced to settle on a farm near the woods. Little do they know that they'll encounter forces of evil in that place that will tear their family apart.
It all started when baby Samuel abruptly disappeared while playing peekaboo with his sister, Thomasin (Anya Taylor-Joy). They all think that it was a witch that abducted him, but they don't really know for sure. The problems didn't stop there. Winter is coming, and they don't have enough food to survive the harsh weather. William and Katherine's (Kate Dickie) other son, Caleb (Harvey Scrimshaw), also got lost in the wood, and their prized Silver Cup disappeared.
Are these God's punishments for them? Or is there something malevolent in the woods that's haunting them?