The game itself will follow a noble knight who has finally made it to the final boss, though this boss has something that the noble night has never come across before, the ability to force others into other worlds. 

After beginning the fight he realises that this creature is a lot stronger than he expected and eventually loses and is shoved into another world. 

Here he has to fight his way through this newly found world and get through the portal that was created from the boss that sent him there. 

This will happen multiple times, each time the knight getting stronger from the different worlds and each time getting a new item to assist him in defeating this boss. 

Eventually after finding an ally in these mysterious worlds he is finally able to defeat the boss and save his world.