You and your friends find a strange object wrapped in weird wrappings. You decide to open it up to see what is inside. As you open the object you see a finger that looks to be of a feminine person but as soon as you get a good look at it you are attacked by curses.

Curse: Give me the finger I need its strength.

Out of fear you end up swallowing the finger as you do your body is taken over by Sukuna.

Sukuna: Finally I'm free after all the years I was for.