Rapid footsteps echo down throughout the damp basement archives of an old lighthouse on the north east coast of England. There are rows of shelves with boxes filled with magnetic tape reels, labelled seemingly meticulously but using a system that's impossible to discern with a casual observation.

A figure carrying a lantern makes their way down the maze of corridors, checking over their shoulder repeatedly as if searching for a pursuer. Wearing a wide brimmed hat, Tom searches frantically, unsure how much time he has left. The librarian knows this system better than anyone else, and he knows where what he's looking for should be stored.

Towards the back of the chamber, somewhere that is carved into the sea bed itself, he slides a ladder and clambers to a high shelf. There he finds a sealed box, a label on the front of it. He grabs it, ...