While on patrol, Eraserhead investigates an anonymous tip at an abandoned warehouse. As he enters the warehouse and finds nothing there. Eraserhead investigates the warehouse and sees a mysterious figure. The Pro Hero runs to the figure to check on him.

Eraserhead: Hey! You okay?

Suddenly, the figure turns around and stabs Eraserhead in the shoulder with needles in his hands. Eraserhead pushes the figure off of him. As Eraserhead staggers around, the figure reveals himself to be Scarecrow and begins to chuckle.

Scarecrow: Sacred you, didn't I?

Eraserhead: S....Scarecrow.....

Eraserhead begins to feel his body grow heavy. He attempts to get away, but blacks out and passes out. Some time later, Eraserhead wakes up inside a coffin. 

Eraserhead: What....what the hell? Where am I? I gotta get out of here and find Scarecrow!

Eraserhead then breaks out of the coffin and digs himself out of the shallow grave. As he gets out, he sees that the area he's in is UA High which has been fashioned like the infamous Arkham Asylum.

Eraserhead: This....this can't be.....this is.....UA.....

As Eraserhead looks around and sees that the coffin he was trapped in has a tombstone with his name on it. It also had a epitaph.

Eraserhead: "Here lies Shota Aizawa: A failure of a Hero and a teacher". Christ....this is sick...

After that, Eraserhead walked through the corridors. As he looks through the windows of the rooms, he sees several of his students either dead of lost to insanity. After walking through the corridors, he jumps the gap and hears the sound of loud, maniacal laughter.

Eraserhead: What the hell is going on here?! This must be Scarecrow's doing!

As he says that, parts of the wall broke apart and a giant version a Scarecrow lets out a bellowing laughter as his eyes shined like a spotlight. As he looks to the area in front of Eraserhead, Eraserhead ducks behind cover.

Scarecrow: Poor little Hero! You're in my world now!

Eraserhead: (Damn. This must be Scarecrow's gas! This is bad! Damn it! Calm down Aizawa. You can do this.)

Eraserhead looks around to see how he could break from Scarecrow's hold on him. In the distance, he sees a a searchlight in the distance. 

Eraserhead: (If I can get to that searchlight, I should be able break free from Scarecrow!)

Eraserhead begins navigating through the asylum while avoiding Scarecrow's gaze. As he does so, Scarecrow laughs.

Scarecrow: Your mind will shatter like glass!

While Eraserhead navigates his way through the asylum, he sees his students die in gruesome and painful ways. He could hear them all calling to him.

Midoriya(Illusion): MR. AIZAWA! PLEASE HELP US!

OCHACO: HELP US! DN'T LET US DIE!

BAKUGO: SOME FUCKING TEACHER YOU TURNED OUT TO BE! WE'RE ALL DEAD BECAUSE OF YOU!

Eraserhead: (Damn you Scarecrow! Damn you to hell!)

Eventually, Eraserhead makes it to the spotlight where Scarecrow spots him.

Scarecrow: Ah! There you are!

But as Eraserhead was about to position to spotlight, reality seems to revert for a brief second as he held Scarecrow by the throat.

Scarecrow: I think you need a little more!

Scarecrow then stabbed Eraserhead's arm with the needles, injecting Eraserhead with more Scarecrow Toxin. Eraserhead lets go of Scarecrow as he laughs. When Eraserhead blinks, he finds himself in a graveyard with a monstrous version of Scarecrow brandishing a large scythe.

Scarecrow: Tell me Eraserhead, what demons have you left to face? What did my Toxin show you? Failing your students? Failing your fellow Pro Heroes? Failing the people you've sworn to protect? Let's see your fears made reality!

Out of the ground rose the mangled zombified versions of his students. Scarecrow lets out a sinister laugh.

Eraserhead: You're gonna pay for that!

The zombified versions of the Class 1-A students begin attacking Eraserhead. Despite the numbers, Eraserhead holds his own.

Midoriya(Nightmare): Why didn't you save us?! You're no Hero!

Yaoyorozu(Nightmare): We're dead because of you! You're a curse on us all!

Todoroki(Nightmare): If you really a Hero, we'd still be alive! If you were a real teacher, we wouldn't be dead!

Eraserhead: Damn it Scarecrow!

Eraserhead's mental stability is pushed to it's absolute limits as he fights his own students, even if they aren't there. Scarecrow watches this with a sadistic smile.

Scarecrow: You're fighting back! Good! This will only weaken your resolve! 

After a hard fought battle, he defeated the nightmare version of his students. As their bodies disappear, Scarecrow readies his scythe.

Scarecrow: And at the end of fear, oblivion! 

Scarecrow then swings his scythe at Eraserhead dodges his attacks. Eraserhead then wraps his Combat Scarves around Scarecrow's scythe and begins yanking at it. Scarecrow keeps a tight grip on it while laughing.

Scarecrow: This is my world! Fear is mine to control! And now madness shall take you forever!

Eraserhead: Not if I have anything to say about it!

Eraserhead begins pulling at the scythe with all his might. As he does so, the graveyard begins to slowly revert back to the warehouse. Scarecrow is baffled at this.

Scarecrow: How are you doing this?! You've ingested enough toxins to drive ten men insane! What are you?!

Eraserhead: I'm a Hero! And you're done!

Eraserhead finally yanks the scythe out of Scarecrow's hands and knocks him out with a punch to the face. As he does that, the effects of the Scarecrow Toxin finally wears off as Eraserhead falls to his knees, comprehending the mental strain he went through.

Eraserhead: It's.....it's over....it's finally over.....

After a few moments to breath, Eraserhead gets up and restrains the unconscious Scarecrow and leaves him for the authorities. 

Eraserhead: That should hold you. 

After tying up Scarecrow, Eraserhead exits the abandoned warehouse and resumes his patrol of the city.