Several hundred years ago, vicious "monsters" suddenly appeared all over the world.
People died by the thousands, and hardly anyone was left alive.
But just as humanity fell into despair, superpowered individuals began to emerge one after another. They were known as "Threshold Bodies," and their powers as "Threshold Energy."
Humanity used "Threshold Energy" to rebuild itself, step by step.
But the "monsters" were far more complicated than they seemed...
Guan Xian is an ordinary high school student who wants to study medicine. Unable to resist the lure of money, he "reluctantly" joins this year's new recruit training camp.
Though he's an exception with no "Threshold Energy," there's something extraordinary about him.
"Captain Guan, do you think humanity still has hope?"
"..."
His companion looks up, getting no answer.
Guan Xian is charging at a sea monster larger than an aircraft carrier, cleaver in hand.
"Boom!" The colossal creature falls.
The man who brought it down wipes the blood from his face.
"Not anymore."
"?"
"I mean, I won't let anyone ask that question again."
Because humanity will fight to the death.
