John Gregory is a Spook charged with ridding the country of witches, beasts and malevolent forces. But, as the years tick by, he realises that he must enlist another to keep evil at bay in the form of Thomas Ward, the seventh son of the seventh son who possesses the power to see things others cannot. When the powerful witch Mother Malkin makes her return, after Gregory thought he'd defeated her years ago, Thomas is forced to confront her and slay her once and for all. But things aren't as easy they seem when he befriends a witch girl who convinces him that not all witches are bad. Will Thomas succeed in sending Malkin back to the grave? Or will he find himself putting his trust in the wrong people?
Continue: Seventh Son Trailer
The film is almost half an hour longer than 'The Force Awakens'.
The film is expected to continue without Mendes' involvement.