Leaving behind his life of violence in Brazil's darkest shadows, Zico is determined to become a better man. But it seems his old life isn't quite done with him yet when he's tasked with making one last kill. It's one that could get him everything he has ever wanted; a house, some land, cash in his pocket, a future for him and his girlfriend, Daniella. But this one isn't like all the others. This one comes at a much higher price.The Darkest Heart is a journey through the shadowy heart of Brazil and the even darker mind of a killer, where fear is a death sentence and the only chance of survival might mean abandoning the only good thing you've ever known.