Humanity has been obsessed with immortality for thousands of years. In the future world, gene fusion technology allows human life span to span hundreds of years, but it also sows the seeds of destruction.
Chen Ren, an unemployed doctor, was fired from the hospital for questioning a report on "gene mutations in tardigrades." On a rainy night when he was drinking to drown his sorrows, the appearance of the mysterious female scientist Chu Ting dragged him into a shocking conspiracy: tardigrades are not passive symbiotic, but have developed intelligence and are quietly seizing the host's consciousness, creating pretenders called "twins". Chen Ren's blocked report is the key evidence of this crisis.
In order to reveal the truth, Chen Ren, with the help of Chu Ting, took the risk and pretended to be the dean and sneaked into the core of the hospital. However, what awaits him is not only a strict blockade, but also a cruel betrayal from his closest wife. He desperately discovered that his gentle wife Wan Qing had already been controlled by the twins and became a cold-blooded killer who wanted to kill him.
The collapse of his personal world allowed Chen Ren to turn grief into strength. He formed an alliance with Chu Ting, and with the assistance of the charming and mysterious secretary Liu Yuelan, he went deep into the restricted area of genetic experiments underground in the hospital. There, the countdown begins for a global alternative called "Crab Slave." They must race against time to find a way to reverse the control signal before the twins fully awaken.
This is a secret war concerning the survival of mankind. Chen Ren not only has to deal with powerful enemies in a crisis-ridden reality, but also has to find the last hope of saving his love and humanity on the ruins of desperate emotions.
