Conan, Haibara, Ran, and the FBI confront Vermouth/Sharon/Chris

Mouri Kogoro receives an invitation to a Halloween mystery costume party. Ran is scared of monsters and ghosts so she doesn't go. But Kogoro goes with Sonoko. Conan keeps it a secret from Ran that he(Shinichi) also got an invitation. On his envelope it is addressed to Kudo Shinichi, but in the letter inside it is to Edogawa Conan. The letter is from Vermouth and it is written in English letters. At this point Conan already suspected foreign actress Chris Vineyard as being involved with the organization, and so he suspects that she might be Vermouth. But either way he knows that she knows his and Haibara's true identity. He also suspects that the house is bugged so when he gets a text he tells Agasa to be quiet. It's a text from Hattori. Conan is asking him to go to the party in his place because he thinks they are trying to lure him out and away from Haibara and so he is staying behind at Agasa's. But, Conan suspects that someone has been in his house lately and so he must check that out too.

Vermouth is on the guest list of the Halloween party so Vodka is sent to see what she's up to.

Then Conan goes to check out his house. That's when he finds out that the one who's been staying there is his mom, because she's been worried about him and wanted to keep an eye on him. She disguises Conan as Haibara, Hattori as Kudo, and gives herself a disguise. They locked Haibara in Agasa's basement. Then Conan waited upstairs as Haibara. And Kudo's mom and Hattori went to the party.

Araide(Vermouth) calls and says he wants to check up on Haibara's cold, and that he'll come pick her(Conan) up. But Jodie shows up first and convinces him to go with her. And Araide follows them.

While in the car Conan as Haibara asks Jodie to do him a favor. This is to find out if Araide really is Vermouth. He tells Jodie about the Araide murder case, and asks her to try and lure her out.
Jodie stops the car at a harbor and gets out. Araide also gets out and she confronts him. She asks him about the upcoming trial that he'll have to testify at and about him covering up for Hiraku. But because only three people, Araide being one of them, knew what really happened, Vermouth, who only learned about the case from the files she stole from the metropolitan police department, didn't know the truth, so Conan could be sure that he wasn't really Araide, and was actually Vermouth. Then Jodie reveals that Chris Vineyard a.k.a Vermouth is her father's killer and "A secret makes a woman, woman" is the last thing she said to her(Jodie) when she was a child.

Jodie's father had been working on a file about Vermouth in secret with the FBI. So Vermouth killed him and burnt down the house. Jodie went down the street to get some juice to make her father feel better so she survived. Then her dad's colleagues put her into the witness protection program. It is revealed that she is also an FBI agent. She followed her dads investigation to pursue Vermouth. 

They knew Vermouth was planning to kill Araide and take his place because she was repeatedly spotted going to his clinic even though she wasn't sick. So, the FBI preemptively made Araide and his family move to America and faked a car crash making it seem like he had died. Then they let Vermouth cover it up (as she thought it was a real crash) and then pose as Araide. When Jodie broke into the clinic after hours she found the dart board with the photos and knew she was on a mission to assassinate the woman in the photo(Sherry). Jodie questions about if Haibara is really the woman in the photo(Sherry), and also questions about Ran and Conan. She also asks why Vermouth never ages.

Vermouth/Chris Vineyard attended her mother's funeral and made the comment to the press "A secret makes a woman, woman" and so Jodie was suspicious of her. She tested her finger prints to those from the glasses that Chris picked up at the scene of Jodie's father's murder 20 years before and they matched. But Chris is too young to have been there that night. That's when Jodie cross-references her prints with their files and realized that Chris Vineyard and her mother are the same person.

That's why Chris Vineyard/ Vermouth protected Conan and called Ran Angel. It's because she was saved by them in New York, when she was Sharon, posed as the serial killer. Also, Sharon is long time friends with Kudo's mom so she knows what Kudo looked like as a kid and so figured out Conan's true identity and has been trying to keep him out of everything.

Vermouth stole all Mouri's files and not just those related to Araide, so that they wouldn't know which ones she really wanted, and would make it seem like Mouri was her target and could lure the FBI out.

Haibara shows up, having broken out and tracked Conan with his spare homing glasses. Conan is distracted and Vermouth turns his tranquilizer watch on him and knocks him out. Haibara came to let Vermouth kill her and end everything, but ran protects her. She was suspicious of Jodie when she say the pictures, and after her dad left for the party she went to talk to Jodie but ended up hiding in her trunk. When she heard gun shots she jumped out and protected Haibara. Vermouth/Sharon/Chris couldn't shoot Ran. Ran and Haibara pass out from shock. Akai shows up with a gun to help Jodie. Calvados kills himself and Vermouth escapes with Conan in her car and shoots and blows up Jodie's, preventing her and Akai from chasing her.

In the woods Vermouth sends a message to the syndicates boss. She notices that Conan recorded it and goes to destroy it but Conan tells her that it's hooked up to a heart monitor, and if the transmitting stops, the recording will be emailed to the police and he also tells her he send the data to a nearby friend (Dr.Agasa).

Out of options Vermouth knocks him out with sleeping gas. If she wakes up first she'll escape and if he wakes up first he'll capture her.

It's revealed that Vermouth was disguised as a serial killer to get Akai to let his guard down so that she could kill him in New York last year. It's also revealed that Gin doesn't remember Kudo Shinichi, but when asked about him Vermouth covers for him. She asks Gin to come pick her up. She woke up first, destroyed Conan's equipment and fled. Agasa came to Conan when his heart rate monitor stopped, but he was obviously fine, he just lost the data.

But Conan remembers the sound of the number Vermouth dialed when she sent the message to her boss.

Also, Vermouth agreed to give up on Sherry.