Do (pronounced like 'dough') lived in South City working as a garbage collector with no memories from seven years ago. The people there hated and avoided him, calling him Grass. In the whole city, only one person was nice to him. When the war escalated between the two countries, Ly and Sa, South City was attacked.

To survive the chaos of war, Do has to travel through many life-threatening dangers. He will meet new people as he regains his memories along with the struggles, complex relationships, and political battles of Ly and Sa that will slowly be unveiled.