Limbo is a small, curious creature inhabiting an endless, ambiguous realm. Accompanied by a playful little ball of light named Float, Limbo explores their mysterious, void-like home, making new discoveries as well as new friends. Suddenly, foreign Invaders attack and have the whole realm under their rule, destroying whoever gets in their way, forcing the pair into hiding. But Limbo and Float soon discover that it's up to them and an unlikely ally to save their home.