Tajo is back in his childhood home, but the city he has known no longer looks like a city of old. Devastated, the inhabitants no longer have food, air, or hope. For Johl Caine's daughter, the time has come to pact with IO and Mertali to try to bring a better future to Salus' people, but a ruthless killer – created by Tajo himself – will not make it easy for them.