Some people die for honor. Others die for a cause. Riku Alison just wants to get paid.
A century ago, the Great Mutation turned Earth into a "Drowning World." Riku learned early: heroism is stupidity, selflessness is death, people are selfish.
The only warmth he's known is his mother, Lily. He watched her break herself for others. So Riku made a cold decision: buy her safety.
Then a massive rupture tears open the sky over the Northern District.
Zones—reality-warping anomalies—are spreading. Bodies pile up. Riku gets pulled into SACH: an elite task force of "saviors" who fight for strangers.
To Riku, it's insane.
But staying invisible isn't an option. If he's going to survive—if he's going to keep Lily safe—he needs to move. He needs to get paid. He needs to do what it takes.
In a drowning world where debts are paid in blood, Riku discovers the line between survival and sacrifice isn't as clear as he thought.