El detectiu Conan investiga l'autoria d'una sèrie d'atemptats terroristes que agiten Tòquio. Alhora, apareix a escena una misteriosa dona anomenada Momiji que afirma ser la xicota de Heiji Hattori, amic d'en Conan. El petit detectiu sospita que els dos fets poden estar relacionats.
Chihaya Ayase has spent most of her life supporting her sister’s model career. When she meets a boy named Arata Wataya, he thinks Chihaya has potential to become a great karuta player. As Chihaya dreams of becoming Japan's best karuta player, she is soon separated from her karuta playing friends. Now in high school, Chihaya still plays karuta in the hope that she will one day meet her friends again.
This series connects the story of the second movie, "Chihayafuru Part II", with the third movie, "Chihayafuru Part III".
