An American spy in China. Name: Unknown. Status: Sleeper.

He's meant to be laying low, polishing his Mandarin and awaiting further instructions from Washington. But Shanghai is a difficult city to sleep in, especially when his nights are taken over by the seductive but enigmatic Mei - a woman with secrets he'd rather not hear.

Then he is tasked with a delicate operation. Infiltrate the core of the Chinese intelligence service. Distinguish friend from foe. Report to a single contact at HQ. Trust no one. Tell no one.

Pushed out into the cold, in a city of millions he's suddenly very, very alone.

But in Shanghai city you're never truly alone. Faceless strangers linger in the shadows, watching your every move. No one is safe from the Guoanbu. Not even a spy with no name...