Terror 404 is the fourth in the Amy Lane mysteries series, following the adventures of agoraphobic grey-hat hacker Amy Lane and her faithful ex-con companion and collaborator Jason. Here, Amy is separated from everything and everyone she knows, isolated in a private psychiatric hospital on the Welsh coast. She has no access to her friends, and is forbidden all forms of IT. Jason, meanwhile, is in hiding and on the run. When another patient in the psychiatric hospital is mysteriously murdered, Amy and Jason must find a way to join forces to solve the murder and save themselves.