A group of workers on a remote Scottish oil rig are due to return to the mainland when a mysterious fog enshrouds them and supernatural forces take hold.

In twelfth-century England, Robin Longstride and his band of marauders confront corruption in a local village and lead an uprising against the crown that will forever alter the balance of world power.

Hoping to alter the events of the past, a 19th century inventor instead travels 800,000 years into the future, where he finds humankind divided into two warring races.