London widow Cora Seaborne moves to Essex to investigate reports of a mythical serpent. She forms a surprising bond of science and skepticism with the local vicar—but when tragedy strikes, locals accuse her of attracting the creature.
Starring Claire Danes, Tom Hiddleston, Frank Dillane, Clémence Poésy, Hayley Squires, Gerard Kearns, Michael Jibson, Caspar Griffiths, Dixie Egerickx, Ryan Reffell