London, the 23rd Century: devastated by a plague of biblical proportions, the city has been consumed by Davy Jones' Locker. Now the Doctor, his latest companion, Amy Pond, and his new companion Cillian Darcy find themselves in a deep sea base. It is a research station designed to study the ruins and salvage some shrapnel of hope from the wreckage. A swarm of monstrous Vashta Nerada have invaded the facility with plans to feast on the crew. Can the Doctor and Amy survive? Only you can decide...