'The Dyson File' is the fifth installment in Jacob Holo's 'Gordian Division' series. When a top engineer on Mercury commits suicide, Detective Isaac Cho and Special Agent Susan Cantrell of the Gordian Division are called in to review the case. But what seems like an open-and-shut case spirals into the strange. And if Cho and Cantrell don't solve the mystery soon, they may be the next ones to wind up dead.