Su Momo, the head of a hidden medical family, accidentally traveled to a parallel world in the 1960s and became a four-and-a-half-year-old baby who was just able to take care of himself. Faced with her scumbag father and stepmother who made her miserable in her previous life, she took advantage of the critical period of her stepmother's pregnancy to rack her brains to prevent the two from having sex while secretly feeding them the heirloom pill, vowing to eliminate all misfortunes at the source.
