London widow Cora Seaborne relocates to Essex to learn the truth about a rumored “sea dragon.” When a local girl goes missing, fears escalate.

After fishermen claim they were attacked by the serpent, Cora becomes more determined to understand what’s in the water.

After fishermen claim they were attacked by the serpent, Cora becomes more determined to understand what’s in the water.

Cora moves to Aldwinter, but the grieving villagers don’t welcome her. Naomi struggles with her guilt about what happened to Gracie.