Harry's performance during the day made the two little friends worried about him. Ron followed him for an afternoon and worried about what terrible things he would do. However, Harry seemed to forget it after swearing to kill the dwarf star. He behaved normally, but when Ron fell asleep, Harry lying on the partition bed suddenly opened his eyes.

He stood in front of the window and looked at the moonlight outside the window. He was a little hesitant. Ron lying on the bed next to him murmured the most, murmuring dreams that no one could hear.

"Sorry, my friend," Harry said in a deep voice, "but there are some things I have to do alone."

He took the sun Sutra under the pillow, put on his invisibility cloak and left the dormitory. He heard the footsteps on the empty corridor and went straight to Gryffindor's rest room. The portrait of the fat woman was dozing. She seemed to hear a lowered voice singing something, but she saw only a white shadow fading rapidly.

From the perspective of the spirit world, Harry easily walked through the door of Gryffindor's lounge. He quietly groped for Filch's office.

"When we were students, we once made a very magical magic prop. James used the magic spell on Hogwarts castle to bypass some of Hogwarts's anti magic spells and fixed the tracking spell on the map. Every Hogwarts student has a strange contract with this great magic school, and the branch hat is one of them A very important part, when the students were assigned to each college by the branch hat, they reached a mysterious contract with the castle. "

"When professors receive the letter of appointment, they will also sign to confirm their contact with Hogwarts."

"There are many mysterious places in this castle. All wizards who have not signed a contract will be suppressed in some aspects. For wizards who have signed a contract, Hogwarts castle can monitor some things, such as their location - this magic prop is made from this. It can monitor the trace of wizard activities in the whole Hogwarts castle."

"James didn't say how he did it, but I guess he found the key items left by the principals before. As principals, they are entitled to use these contracts to bypass the anti tracking spell magic retained in Hogwarts castle."

"We put our thoughts and memories into this magical map, so as to escape the tracking of the school gatekeeper and travel around at night. On that map, I am called moon face, Sirius is called Bigfoot, and your father, James... His name is pointed fork, and dwarf Peter is Wormtail."

"The origin of these nicknames is related to the deformation of our Animagus. In order to alleviate my wolf venom, James taught himself Animagus. Sirius is a big black dog, so it is called Bigfoot. James is a deer, and Peter Pettigrew is a mouse."

"You know, Potter, everyone's Animagus has something to do with their character, descent and even fate."

"We didn't notice at that time, because dwarf Peter's character was too weak and timid. He was like a little brother following James."

"The night your father died, I realized that there was a traitor between us. He took refuge in Voldemort! But I don't believe it's Sirius. Listen to me, no one is more loyal than him, so he is a big black dog. And the dead dwarf Peter... Animagus is a wizard of mice. Although they can't believe it, there is betrayal in their souls 。”

"When I saw the picture of the mouse lying on your friend's shoulder, I was more sure of my judgment. The dwarf is not dead, and has been with you recently."

"I can't tell you what the truth is. It's up to you to investigate and judge."

"The living point map left by James can help you. As long as the dwarf star is still hidden in Hogwarts, it will not escape the monitoring of the map. However, you should pay attention to that when the dwarf star appears on the map, he will be displayed as a Wormtail. The map can not be solved by the general explicit curse. You need to raise your wand and say to the map: I solemnly swear I didn't do good."

"After use, read it out; 'the prank is finished' is OK."

"James was caught once by filch near graduation, and the living point map was confiscated. It should be in his office now."

Harry gradually approached Filch's office door. In the vision of the spiritual world, he saw the waves behind the office like black water waves, and a burst of suction came out from behind the door. Harry was a little surprised, because this was the first time he found that what could affect the spiritual world from the material world!

He listened through the office and heard Filch's voice saying, "master, Harry Potter didn't say anything to Dumbledore. The professors' reaction was normal, and the news from the Ministry of magic was true... There was a terrible black wizard who destroyed the whole Ministry of magic and made Aurors like lost dogs."

"Well done, filch!" Harry could clearly hear Malfoy's voice.

Under the vision of the spirit world, Malfoy was like a twisted light and shadow. The center was a thick shadow like a black dragon, wrapped in the middle by a transparent light like glass. Harry wanted to see the twisted light and shadow clearly. He borrowed the power of the Golden Book of the sun. Malfoy's essence was like a glimpse. It was a withering young dragon, holding a black magic book in his hand.

"Who?" Malfoy suddenly became alert. He looked around suspiciously.

Filch carefully replied, "no one, master, under your spell, no one can sneak in, even Harry in invisibility."

"I can't stay here too long." Malfoy was suspicious and didn't want to say anything more: "be careful, filch!" then he turned into a wisp of black smoke and left.

"It's really the black book of the dead." Harry had seen it.

He looked at the place where Malfoy disappeared for a while, and Harry didn't come back until filch sneaked out. If it had been before, he would have caught up with Malfoy to see what conspiracy Malfoy had, but now Harry, tortured by hatred, only wanted revenge. In particular, dwarf may not only be the traitor who betrayed his parents, but also hide Voldemort's soul.

Harry couldn't tell which one he hated more? But he never wanted to let go of the opportunity to kill the two most important enemies at one time.

"The living point map flies!" Harry cast the flying spell, but there was no response.

Harry is not angry. He has long suspected that filch may not have the map. If anyone in Hogwarts knows the things in Filch's office, the naughty things, and the people who make trouble together at night, it must be the Weasley twins. Live on the whereabouts of the map, The Weasley brothers are most likely to know - but Harry's time is running out.