In this episode, there is a great deal of suspense and mystery as opposing agents of the Ministry of the Occult and the Science Academy vie for a mysterious box. We open with Victorique demonstrating how the double murder in the previous episode was accomplished. She does not get too far into her demonstration before it’s revealed that she may have caught another cold. In addition, just before we go to the opening credits, there are two new arrivals in the train compartment.
When we are back from credits, the new people introduce themselves in a peculiarly fairytale way. There is a knight, an orphan, a “scarecrow” and a “wood cutter.” Kujo is understandably confused but Victorique chooses to introduce herself as an “ancient Gray Wolf,” and Kujo as her “dullard servant” (much to Kujo’s outrage).
We cut to Cordelia and Brian who are discussing the mysterious box that everyone is looking for. Cordelia believes that the contents of the box will be able to protect Victorique from the “storm” that is coming. Brian does not seem convinced and is displaying his (very evident) dislike for Victorique. (It is also clear that he would prefer that Cordelia and he be the ones to have custody of the box.)
Back on the train, Kujo is reading a newspaper where we discover that there has been a fairly high profile kidnapping. Kujo talks to Victorique, asking her to tell him what she had been about to say before being interrupted. Victorique explains to Kujo about a custom involving a “memento box,” an object that contains certain important artifacts from a person’s life. The mysterious box is a memento box and it contains certain important secrets from someone’s life that the Ministry of the Occult and the Science Academy are desperate to acquire or protect from the other side.
The agents of both sides immediately begin competing and bumping each other off in order to acquire the box. Kujo and Victorique are more or less caught in the middle and have to make a number of moves on their own as Victorique tries to figure out who is who. (Kujo is of course clueless at first, but Victorique manages to find a way to explain the situation.)
After the exposition, we have a brief scene where someone is talking to his sister over the radio. It seems that she’s in a desperate situation and he is trying to help her. The shadowy figure is apparently being coerced into working for one of the two sides in this masquerade between the Academy and the Ministry. A few seconds later, we see that the person is the woodcutter. Kujo questions him, but the woodcutter is not willing to give any information.
Victorique and Kujo end up going to the dining car with the agents. They play a wishing game involving raisins soaked in liquor then set on fire. As they play the game, the various agents attempt to maneuver each other into revealing themselves as being on one side or another. There’s also a murder attempt that results in an altercation and a generalized panic in the dining car.
Victorique identifies the woodcutter by name (it turns out that he is the brother of the girl who had been kidnapped).
She questions him about what the “masquerade” between the opposing agents is about, but he does not get to answer immediately. One of the other agents (whom he had previously attempted to kill) retaliates, and staggers out of the dining car with the box.
Kujo, being the chivalrous dork that he is, tries to get the agent to sit down because she has just been poisoned. Another agent informs them that it doesn’t matter what happens because they hadn’t been able to report at the scheduled time. This means that the train is going to get blown to pieces. (It also means that Victorique and Kujo will now have to find a way to keep the train from being blown off the track.) The “knight” agent heads out the door, leaving Kujo and Victorique with the remaining agent.
At the prompting of the remaining agent, Kujo decides that they really need to stop the train. He breaks a window and gets ready to climb up on the roof. Victorique of course insists on going with him. After an altercation with one of the agents they manage to reach the place where the poisoned agent had finally collapsed. She declares that she will not give up the box just before her statement becomes entirely moot. Just before she dies, she mentions a bomb.
Victorique takes the agent’s gun and shoots out the window. Up ahead we can see a flash that Victorique identifies as the timer of the bomb. At this point in time, they are too far away to shoot the timer. She tries a second time, but still can’t hit it. Kujo hauls her back into the train before she tries a third time.
It’s revealed that there is only one bullet left. Victorique states that she will be able to hit the device this time, but Kujo says no, he’s going to do it. Victorique raises a very strong objection to this, because her mother said that Victorique had to do this (solve the mystery) with her own hands. Kujo insists that he’s going to help her and she relents a little, but in the most backhanded manner possible. (She states she’s letting him help because the master and servant are as one, Kujo replies that she’s exasperating.)
They both head outside and with Kujo supporting her, she manages to shoot the device, and the train is able to pass safely over the bridge. (We get a brief cutaway scene to Cordelia, looking relieved.)
The next scene is Victorique solving all the other puzzles of the memento box. (She also confirms that the surviving agent was being forced to work for the Ministry of the Occult.) It is also revealed that Jupiter Roget, the head of the Science Academy is in fact a Gray Wolf. Victorique gives the Ministry agent the memento box, but withholds one of the mementos from the box, in case she needs it later.