It's about four people who wake up on some distant planet to learn that they're going to be participating in a game. (The game is kind of like for entertainment but there is an underlying ulterior for why these aliens are hosting it, it has to do with who the winner is)
And these 4 humans are either going to be put on a team together or they're going to be put on separate teams with other aliens from all different worlds. Although they're mostly all probably going to be humanoid or something. No matter which one I pick they will be teams of 4. To get around the language barrier for this choice I would probably have them implant chips into the brains of all participants that translates their languages into their own so they can understand each other. Either that or they'll just have to use their heads and find another way to communicate.
And it's not going to be like the Hunger Games in the fact that they are put into an arena where they all have to kill each other. It's going to be more like riddles and problem solving using teamwork, except they're going to be thrown into really dangerous and complicated situations.
So that's the jist of it, what do you think? :)