Semen saves the world, zombies besiege the city

After the zombie outbreak, 20-year-old Glenn unexpectedly discovers that his own semen is the only cure. He forms a team with the recovering Lily and Mengru to rescue trapped people by constantly extracting semen. With semen in crisis and zombies besieging them, the three are trapped in a deadly alley. While they struggle to survive, an even greater crisis is approaching.