Join Viki and her brother Sora along with her friend, Goofy, and Donald, on a journey to save Kingdom Hearts once again. The four travel to new worlds along with some old worlds they have been. They will face new challenges but the biggest challenge is when Viki finds out that someone else is inside her heart, and that person plays an important role just like her. Will Viki save the ones she cares about and helps save the person trapped inside her heart or does Xehanort have other plans in store?