If you'll recall, at the end of "Rise of the Planet of the Apes” all hell broke loose. After a fierce battle on the Golden Gate bridge, the apes went "home" to the tops of the Redwoods outside San Francisco, But one of the characters was infected by one of the experimental drug and the ending showed a graphic tracing the spread of the humanity-killing virus to Europe and then around the globe via international airline flight routes. Got all that? That set up the sequel “Dawn of the Planet of the Apes” directed by Matt Reeves, which takes place 10 years later (and is getting beaming reviews thus far).
What happens in the ensuing years between films? Well, 20th Century Fox has collaborated with Motherboard (VICE's science and tech channel) to create "Island of Apes," a short film to explain it all. And they've also released three short films and a trailer before the full film hits tomorrow.