Valentine's Day Massacre! Love is in the air as Conan and company face the most dangerous time of the year: Valentine's Day! Detective Sato of the Metropolitan Police has reluctantly agreed to an arranged marriage - unless her partner Takagi can work up the nerve to confess his feelings. But first he's got to catch a witness! Then Rachel and Serena head to a snowbound cottage to make some of the famous local chocolate for Valentine's Day. But the snow goddess who haunts the mountains seem determined to turn their outing from sweet to bitter....