The year is 1812. Europe is being torn apart by the wars against Napoleon, the navies of independent America and Britain are harassing each other in the North Atlantic, and construction of the breakwater - the Nations Great Endeavour - has begun in Plymouth Sound. But the Grey, the secret group that protects Plymouth from paranormal threats, have more important issues to deal with. One concerns a blue door, and the other has lots of tentacles and a bad attitude. Alan, the leader of the Grey, has given the task of training the Kraken to the Grey’s newest members - Horace (Mr Edwards) and Eugenie (Miss Hall). Unfortunately things aren’t going to plan. When a body washes up on the shore sparking fears of a murderer on the loose in Plymouth it becomes a race against time for the Grey to deal with the monster before it kills again. Or will they run out of chocolate first?