At the age of seventeen, Su Mu picked up a piece of iron sheet in the back mountain. It was engraved on it: Su Mu, target confirmed, level cleared.
Only then did he learn that there was a chip buried in the back of his neck, which was implanted by his mother herself fourteen months after his birth. The purge window has been open for ten months, and he will die on his twentieth birthday.
His mother left him a letter: Don't trust anyone, including your grandfather.
The boy carried a bamboo basket and went to Africa. There was his mother's operating room, a way to save his life, and the mysterious organization "The Cradle" with a million-dollar reward. The chip his mother left for him is said to be able to open all the doors of the cradle.
