The Last of Us is a hit video game for a reason and it has everything to do with its plot. There are ways to judge how good a video game is for one reason or another but with The Last of Us, the plot is cinematic in nature. That means fans expect a lot from the live-action series due to premiere on HBO. But if you’re unfamiliar with the game, you might be wondering exactly what the plot of the series is.

Now, Neil Druckmann has said that the series will differ from the game so we don’t know exactly what is going to happen or how different it’ll be. For the most part, however, the main plot of the game is simple: Joel Miller must get Ellie Williams to the Fireflies, a rebel group fighting to survive in a world plagued by a zombie virus. The objective is easy to understand, but the game has a lot of moving parts—which is what makes it so special.