Heiji and Kazuha come from Osaka to see holiday lights with Conan and Ran. While Ran and Kazuha are making dinner, Conan and Heiji kill time at Cafe Poirot. Beika University students Ozumi, Yui, Anzai, and Nagatsuka sit at the table next to them to celebrate Yui`s birthday. Later, a breaker is tripped and the cafe is plunged into darkness. When cafe employee Azusa resets the breaker and the lights come back on, Conan and the other patrons are speechless. On the floor is Anzai, who has been stabbed in the back with a knife...