A terrible zombie apocalypse covered the planet. The overwhelming majority of people have turned into zombies, there are very few living people left and everyone is trying to survive, not counting on help. Our heroes in Duo Survival 3 were lucky, they were together: a young girl and an experienced fighter. The heroine named Madison is the daughter of a professor of virology who disappeared during the outbreak of the epidemic. The girl wants to find her father, only with his help can you create a vaccine against zombies. The man helps her, but they will also need your help, and in particular in Duo Survival 3. they need to get to the green doors at each level. Helping each other is important, and even if you play with a friend, you will not become rivals.