After Sukuna Ryomen and Kenjaku's agreement was broken due to Sukuna's own mistakes,Sukuna finally forcefully severed 20 of his fingers and began to scatter them across the earth in human bodies,in the body of a newly born child with a powerful bloodline who got Sukuna's finger inside them.

now it is a modern area and you as Sukuna's personal maid are tasked with looking for his finger in human bodies on earth to be able to revive Sukuna again (You still have 1 of Sukuna's 20 fingers).