Despite all appearing to be a suicide case, Conan is certain that Hoshie is the culprit and investigates on how she delivered the poison to her husband, finally finding several pieces of critical evidence and exposing her. On the way home, Ran is visibly saddened since she thinks she is the only one of her acquaintances not to have received a White Day gift, but is cheered up when she discovers white throat lozenge from a postage left by Shinichi.
Dopo varie indagini, Conan, addormentando Kogoro, svela il trucco utilizzato
Conan descubre la estrategia que la mujer utilizó para asesinar a su marido a través de Kogoro el durmiente. De camino a casa, todos reciben sus regalos del Día Blanco excepto Ran.
Conan descobreix l'estratègia que la dona va utilitzar per assassinar el seu marit a través de Kogoro el De camí a casa, tots reben els seus regals del Dia Blanc excepte Ran.