In CellRun you play a cell, that has taken a fancy to gems, out of all things. You know what they say, cells and gems go together. They don't? Oh well, they do in this game. But wait! Nasty viruses are also here to spoil our happy cell's life. What a twist! Luckily boosters are conveniently located all over the world, because, why not? It's a mad world, i know.