"The mad dragon crawling out of hell will stain the sky with blood!"
Qin Feng, who was once the world's top mercenary "Dragon Ya", was imprisoned in the world's most terrifying prison - "Death Prison" due to a conspiracy. SSS-level criminals are imprisoned here: drug lords, arms dealers, hacker kings, underground boxing kings...
However, Qin Feng awakened his mysterious bloodline in prison, met the hidden medical saint, subdued all the madmen, and became the uncrowned king of death prison!
After being released from prison, he led a "Crazy Dragon Mercenary Group" composed of condemned criminals to sweep across the world's dark forces, seek revenge on those behind the scenes, and finally reach the top of the world!