While Kogoro continues to drink, Conan knocks him out with his tranquilizing dart. As the great detective falls into place, Conan runs to the backside of the folding screen located behind Kogoro. Using his voice changing bowtie, Conan calls everyone over, claiming to know the killer’s identity when asked by Megure. Conan continues on to state that the person who murdered Chikaishi and Itoe, as well as attacked Tamanosuke twice, is one of the three people present: Muraki, Yuri, and Tajima. While Muraki and Yuri are shocked, Tajima begins to get up out of anger at such an accusation towards the three of them. Megure attempts to calm him down, stating that they should just listen to Mouri for the time being because he helped save Tamanosuke’s life during the attack at the hospital. Conan explains that according to hospital records, the physique of the culprit from the hospital event matched records of Edo Boy, the same topic that created all of the original problems to begin with. Further explaining his deduction, Conan states that Edo Boy committed crimes all across Japan, later stating that the three suspects should all recall missing things belonging to them in the past half year. Muraki claims that he and Yuri and previously reported such occurrences to the police, stating that the two of them have an alibi and are innocent. Conan explains that only two people in the troupe can do acrobats, confirmed by Yuri who states that she and Muraki both learned from Tajima, who suffered from a waist injury three years prior and could no longer perform. Conan states that Tamanosuke wanted to push the story of Edo Boy for their performance, but that problems arose when Chikaishi wrote differently from what the ringleader asked for. As for why Chikaishi changed the script, Conan explains that the writer had discovered the true face of Edo Boy during his investigation on the topic. Blackmailing Edo Boy, Chikaishi promised to change the script in exchange for cash. At this point, Conan reveals Edo Boy to be
Kenzo Tajima.
When Megure asks if the waist injury story was a lie, Conan claims to remember hearing that Tajima had indeed gained an injury three years prior. However, at some point during the past year, the pain had gone away, allowing Tajima to once again do acrobatics. Infuriated by the claims, Tajima attempts to storm out of the room but is stopped by Takagi and another police officer. Muraki, in disbelief by the claims, asks his mentor if he really is the killer. Despite his quick denial, Kogoro states that all of the facts point to Tajima. Claiming that the only people with time to see Chikaishi on the day of his murder were Muraki, Yuri, and Tajima, Conan recalls that due to a lack of troupe members, the three of them all had to play two roles. As Muraki needed to be in the basement prior to his timed entrance, he had to change costumes while running down the steps. Due to the time constraint and depth of the basement, there was no way Muraki could be the killer. This left Yuri and Tajima, the last two troupe members to change, as the only possible suspects.
Even with his innocence proven, Muraki interrupts, stating that while Chikaishi may have been murdered, the death of Itoe was an accident. The paper found at the second crime scene telling Itoe to meet at the stage during the night was given to all cast members. Conan explains that in the message, the "Itoe" was not meant to call out Itoe Itoe Ogiwara specifically, but rather, it stood for "I to e". Even though Tamanosuke knew that Edo Boy had killed Chikaishi, the troupe leader did not know the true identity of the thief. The reason Tamanosuke gave the notice out to all troupe members was to get the attention of Edo Boy and meet with him personally. However, Itoe mistook the meeting as a confrontation for her suspected money laundering. When she got to the stage that night, she fell victim to a trap set by Edo Boy for Tamanosuke to fall into. When Tamanosuke later visited the stage that night, he was knocked out immediately, meaning that the troupe leader could not have possibly set the trap up as was originally suspected. At this point, Tajima begins to point out that just because he had time to kill Chikaishi doesn't give any proof that he killed Itoe. Pointing out Yuri, Tajima reminds everyone that she could be the killer. When Conan points out that the suspect fleeing from the hospital was identical in size to Tajima, the latter laughs off the claim, stating that such a thing means nothing.
Finally, Conan tells Megure to once again inspect Chikaishi's laptop for fingerprints. When Megure asks why they need to search a third time, Conan reveals that the killer used the laptop again to make sure that the disk had removed all incriminating evidence on him. Assuming that the police would not search for fingerprints again, the suspect, in a rush, used the device without gloves. Just as Megure orders Takagi to have the laptop searched again, Tajima admits his guilt. When the blackmailing Chikaishi had been killed, Tajima explained that he finally felt safe. However, when Tamanosuke sent out the letter to everyone, fear and rage once again consumed him. Without thinking of the consequences, Tajima set up a trap at the meeting spot by putting the wooden boards over the stage hole. When Itoe fell through the trap, Tajima attempted to hide the evidence but was spotted by Tamanosuke.
As Tajima finished explaining what happened, the door opens to Tamanosuke in a wheelchair along with his sister Megumi. Tamanosuke attempts to apologize, claiming that everything was his fault for insisting on the Edo Boy play. The troupe leader explains that he didn't mean to chase away Tajima with the play; all Tamanosuke wanted was for Tajima to stop his crimes and turn himself in. Teary-eyed and full of remorse, Tajima falls to his knees and begs for forgiveness.
Conan later explains that following the case, the stage was repaired and the play went through some major changes. Despite his injuries, Tamanosuke insisted on performing. As thanks for solving the case, the troupe leader invited Conan, the Detective Boys, Ran, Sonoko, Kogoro, Megure, and Takagi to appear with him for the play.
