Kirby discovers the ancient Dimension Gate, a link between dimensions. He does not enter because he doesn't know what is on the other side, but the next morning, the citizens say that King Dedede had entered the gate! Meta Knight and Kirby organize a meeting, and all of the heroes in Dreamland agree to enter to find the king. They all head in, but it closes behind them and leaves them trapped in a dark void. They must rescue King Dedede and find a way out, while along the way teaming up with various others from different dimensions.