一年一度的七夕即将到来,东京、神奈、静冈、长野等地却接连发生六起连环杀人案,被害者身边皆留下麻将牌中的七筒和奇怪暗示。由于作案范围过大,各地警署探员纷纷聚到东京警署的专案组共同研究案情,毛利小五郎也被邀请参加,柯南则偷偷听取了会议的内容。会后,柯南无意中听到群马县警部山村操哼唱的童谣,继而发现有黑衣组织的成员混进警察中间。在一次围捕行动中,柯南遇到假扮人质的Vermouth,得知近期一连串的杀人案件与存有组织内部人员资料的记忆卡有关。与此同时,潜入警察内部的间谍偷偷盗取工藤新一和柯南的指纹,新一的身份眼看被拆穿,巨大的危险正向他和身边的人急速袭来……The police superintendent, disguised by black suits (IRish), checked that Conan and Shinichi are 98% identical! Conan is getting into danger...! Would that police superintendent tell Gin about this news? Rachel broke Conan's bowl!next day when Rachel went school Serena spoke about the dark knight helmet...Conan went school to hear that his clay dolphin lose its dorsal fin... Would Conan be able to stay alive as Heiji hopes inside phone when talking about "BBQ in Kyoto"?