In late 2018, Chinese scientist He caused a shockwave in the entire scientific community. His experiment had led to the birth of babies whose DNA had been altered by scientists for the first time: he had performed an edit via CRISPR aiming to give the babies immunity to HIV. The international uproar and swift moves by Chinese authorities led to the disappearance of both the scientist and the babies. This documentary thriller traces the trajectory of He’s experiment: did he act alone, or were more people in on it? Who asked questions and who remained silent?