Early one morning, a former CIA agent is shot dead in San Francisco. That night, an army vet is gunned down in his doorway. The next day, John Wells gets a phone call from his CIA bosses. Come to Langley. Now. 

Wells discovers what links the victims: they were part of an interrogation team that operated out of a secret US base in Poland called the Midnight House. Only a handful of people knew of its existence. For two years, the team put the screws on the toughest jihadis, men thought to have knowledge of imminent threats - and they used whatever means necessary. Disbanded in the wake of public controversy, they were given medals for their heroism, Prozac for their nightmares. Now Wells must find out who is killing them. 

Islamic terrorists are the likeliest explanation, and Wells is uniquely qualified to go undercover after them. But the trail of blood he discovers will lead him and his boss, Ellis Shafer, to a place they could not have imagined - and leave Wells facing tough questions about loyalty, patriotism and the men of the Midnight House.