Agent Six of Hearts, 16-year-old superhuman, is on a mission. His brother Kyntak has been kidnapped. A strange and sinister new figure is rising in power. Six is suspected of being a double agent. The Deck has been put into lockdown by the Queen of Spades. A mysterious girl has appeared who acts as Six's guardian angel. Who can he trust?

As the clock ticks steadily against Kyntak's life, Six of Hearts is on the run: from his past, from his fellow agents at the Deck, even from his own DNA....