Matt Haag, nicknamed The Professor, was invited to attend a dinner party at an Estate hosted and owned Joey Graceffa, which was only accessible by traveling to the 1920s. Matt immediately has suspicions about Lele Pons, causing them to hate each other, constantly voting for each other throughout the season. He is one of the only two guests who didn’t vote for Justine Ezarik to be buried alive. He volunteers himself into the Exorcism challenge, but takes it back, which everyone says you can’t do, causing him to be voted into the challenge against Sierra Furtado. Matt skims through one of the instructions, and places the rosary on Sierra, which kills her. He then reads the note fully, finding out he could’ve killed himself or Sierra. He becomes depressed after this, blaming himself for Sierra’s death, causing him to give up on the group, believing that they were all going to die. The group turns their back on Matt, voting him in again the next episode to fight Timothy DeLaGhetto in the Doll Room Challenge. Matt believes he has his doll placement correct, but is actually wrong, causing him to drink more poison instead of the antidote, killing him.
Episode 1 - An Invitation
Matt is assigned the role as 'The Professor'. He talks about how he doesn't go to parties much. When Shane Dawson is poisoned, he reads the telegram that he received right before he was poisoned. When the group splits in to three, he is with Oli White and Lele Pons trying to finish a puzzle. Matt and Lele do not like each other immediatly. The group cannot complete the puzzle in time, along with another group, causing Shane to die from the poison he ate.
Episode 2 - The Ungodly Machine
At voting, Matt does not trust or like Lele and wants her to be the one to go, as she accused Tim of being a murderer straight away.
Episode 3 - Buried Alive
While everyone is accusing each other, Matt is the first one to accuse Justine of working with the evil, as he says she took out Andrea, saboutaged the entire death machine and that it has to be her. She gets very defensive about this, and says that she told Andrea not to pick her since she is stupid, to this, Matt responds saying that it doesn't change the fact that she killed her. This causes most of the group to think that Justine is the one in leagues with the evil spirit. He goes with Eva and Sierra into the spare room to look for a lock of hair that they need for a seance. While they are alone, he asks the two who they think is working in league with the evil. Sierra says Joey, as they are in his house. Matt, however, says that he thinks that it is either Lele or Justine. To this, Eva and Sierra say that they don't think it is Lele, and that she's just crazy. Eva says that she thinks it is either Justine or Joey, and Sierra agrees with her. While the three of them are searching, Matt notices that there is a crease in the wall, he investigates it and a secret doorway appears, revealing a bathroom. Matt sees a wig in the shower of the bathroom, and it happens to be the wig that they needed to perform the seance. They cut the lock of hair and go downstairs so they can start the seance. He later points out the fact that the seance positioning is wrong, so they fix it. Once the seance is ready, they use Sarah to speak to a woman named Caroline Eastwick who was buried alive. They later split up into two groups, one of which finds the key to the coffin where Caroline was buried, while the other group actually has to find the coffin. Matt goes with the group that needs to find the key, along with Sierra, Lele, Justine and Sarah. He takes his opportunity and walks to the back with Justine. He asks Justine if she is working with the evil, to which she says that she's not and he tells her that he thinks that it is Lele. Before she can respond, Sierra asks what they are doing and tells them to hurry up. The group notice a piano in the middle of nowhere, Matt says that it is really creepy. He tells the group that maybe they shouldn't go near it. They decide to investigate it anyway. The group finds a music box inside of the piano. Justine tells the group to replicate the song that the piano is playing, and Lele plays it. When she does, the key falls out of the piano. Once the guests meet up again, Matt helps dig up the coffin. They find out that it is empty, apart from a note. He reads the note inside of the coffin, which says that to conceal artifact, it requires an unwilling soul to be buried alive, and it was Caroline's. Now another soul must be buried in order to reverse the spell and then get the artifact. After reading the note, he says that they will have to kill somebody. During voting, Matt talks with Joey and Justine, being one of the few who isn't targeting her, despite accusing her at the start of the episode. Joey and Justine say that they wanna vote in Tim. It is unknown who he voted to go in, but it was most likely either Lele or Tim. He says that the fact the they were burying somebody who was right next to them a second ago is unexplainable. They find a box come up from the ground, and Matt points out that it has the marking they saw earlier in it. Inside is an artifact. Matt says that he doesn't want to do this anymore, and that it is breaking his spirit.
Episode 4 - Mannequins
Episode 5 - Freak Show
Episode 6 - Did Someone Call For An Exorcist?
Due to a failed exorcism, Matt murders Sierra, and thus, decides not to care about anybody's lives. Because of this, they all turn against him.
Episode 7 - Mermaid Tails
Matt dies this episode by failing to complete his doll house correctly, causing him to drink poison twice. He was against Tim.
- "Do you have any mints? Any gum? Mints? Mints? Mints?"
- "This girl (Lele) is the problem."
- ”Are you okay?” (Proceeds to waiting for a dead GloZell Green to respond) “She’s dead.”
- ”Sierra, are you okay!?”
- ”I just don’t see the light at the end of the tunnel here.”
- ”I’ve checked out, I killed Sierra. It’s over.”
- ”I vote that everyone sucks.“
- ”I’m pretty sure I’m right... I’m sorry if it’s you, but...“ - Proceed to accidentally drink poison and die.