In the Mars colony in 2157, miner Qi Yue accidentally touched the alien relic "Prometheus' Grip", and his right hand fused with the mysterious metal and mutated. As the alien material in his body continued to corrode his body, he discovered that he was actually the "key bearer" selected by an alien civilization millions of years ago. Earth Security Bureau agent Lin Yutong was ordered to hunt down this "high-risk mutant," but he didn't know that his body also contained forcibly implanted alien genes. When the two people are chasing and escaping, they discover that each other's fate has been secretly controlled by the "Seven Circles", and they must work together to uncover the ancient secrets of the Mars underground - the alien collective consciousness known as the "Watcher" is waiting to awaken, and human civilization is just its chosen container...
