It starts on the south coast. You spawn with only a bandage, sword, water bottle, and an eye (that sends chats out to the world - I'll explain later) in your inventory. You'll need to eat, drink, and not die. Like DayZ, how do it is completely up to you. Life is hard, made harder still by heading north where the cool things are. Loot is semi-rare, and you can always rely on people to be assholes right from the second you're born. I've died seconds after spawning on a few occasions, I've watched people chasing others and did my best to get out of sight. It can be wholly unpleasant, which is the entire point.