In the duel with the organization, Ai died under Gin's bullet in order to protect Conan, and accidentally fell into the secret passage leading to the core of the organization, returning to the time when he was just born.
The Miyano couple rely on their innate ability to predict danger. Guessing that she didn't have much time left, she entrusted Shiho to Dr. Agasa, asking her not to be used by the organization, and was named Ai Haihara by Dr. Agasa.