This is when they're all 13, Klaus comes close to taking drugs again after being told that Reginald wants to see him (lock him in the mausoleum) and when they all go off on him, causing him to leave the room, Ben (who's alive again) decides to inform them why he started using and just how hard it is being him. Slight Luther bashing. In this AU no one knows about Dave except for Ben.

"Give me that" Luther spat, snatching the bag of drugs out of Klaus' hands.

"What the hell were you thinking?, Especially doing it before you have to meet Dad." Diego said, vehemently glaring daggers at Klaus.

Avoiding he disappointed headshakes and glares, he softly started "I just wanted to-"

"To what? Get high as a kite and then use that as an excuse to justify your-?" Luther began but stopped himself.

"An excuse for what?"

"You know, maybe shouldn't-" Both Allison and Vanya started

"No, I want to hear this."

"An excuse to justify your failure." Luther said, slightly hesitantly.

"Excuse me?!"

"He's right you know." Diego added "You constantly let us do all the work while you just do nothing all the time."

"Except for that one time when the world was about to end and you materialized Ben, you don't contribute your power at all and let us do it." Five then interjected as well.

"Simply saying that you don't like your power, acting as if that's an excuse to slack off." Luther finished.

"Wow. Allison, Vanya, you think the same?" Klaus asked his eyes a clear mask of hurt from his siblings harsh words.

Allison looked away uncomfortably before awkwardly stammering out "Well... Some of it... I mean..." She awkwardly trailed off. Vanya just bit her lip and looked away.

"Actually, I was taking this drugs to be prepared. Now if you don't mind, I'm off to go meet that sadistic prick we call a father." Klaus said, not meeting any of their glares ad glances, before walking out of the room and down the corridor and disappearing out of sight.

"What the hell was that?!" Ben instantly began.

"What was needed to be said." Luther slightly smugly said.

"It's all true. I mean, you were stuck to him for years. You must have seen it." Diego added on.

"That's it. Sit. Down. You're going to listen." Ben stated, his voice leaving no room for arguments. And so they all sat down, a little confused as to what he was going to say.

"Well, we might as well from the beginning. Your powers, all our powers they all have a sort of off switch. Allison, your power only activates when you say I heard a rumour. Diego and Luther, your knife curving and super strength don't really affect any other aspects of your lives. Five, your not constantly jumping through time uncontrollably."

"Point being?" Five asked

"Klaus doesn't. His power doesn't have an off switch. And that was manageable for him until Father happened. Did any of you ever notice how many quarantined sick days Klaus had?" Blank stares that slowly crept into the odd realization that Ben was right and Klaus had had a lot of sick days. "He wasn't really sick. What was happening was that Father was locking him in a mausoleum for hours, days on end."

"Mausoleum?" Vanya questioned

"A giant room, the size of a ballroom, filled with tombs. Ever since then, his powers got worse. Spirits were constantly whispering in his ear, telling them how they died, who killed them, he'd see spirits 24/7, almost all of them shouting at him, as close as they could possibly get to him, spirits with guts and blood spewing out of them, he couldn't sleep. And then he discovered that drinking and doing drugs took all of that away. He didn't hear them anymore. Didn't see them anymore. He slept. To him, it was his off switch." Ben finished

Everyone had shocked expressions on their faces, with Allison slight welling up with sympathy

"We had no idea-" Luther began.

"Of course not. Yet you don't mind constantly reminding everyone how Dad sent you to the moon." Ben slightly spiteful added. Luther looked away, his cheeks burning red.

"And did you know he was kidnapped?"

Everyone except for Five looked extremely confused. "What, when?" They all began.

"When Hazel and Cha-Cha came and attacked, they took Klaus instead of me." Five informed everyone.

"You didn't even notice he was missing." Ben said, barely concealing his obvious anger towards them. All of them looked down in shame. "10. Hours. They tortured him for 10 hours. He escaped and took their time travelling briefcase, and accidentally went back in time. Where to? To 1968. Smack bang in the middle of the Vietnam war. There he met the only person he's ever truly loved. His name was Dave. He loved him so much, that he would rather have stayed there, with Dave, in the middle of a war for the rest of his life than go back to the present with all of you. But Dave died in Klaus' arms after being shot." He finished, wiping away a few small tears as he remembered watching Klaus cry over Dave's lifeless body.

Everyone just looked into space in complete and utter silence, not even Luther said anything.

"And that was that. He came back to the present. Again, no one had even noticed he was missing. And when he said that he was thinking of taking drugs to be prepared, well, Dad is probably going to lock Klaus in the mausoleum again, possibly locking him in at this very second and he was wondering whether to endure that in silence or in agony. I guess he chose agony."

Speechless. No one knew what to say.

"Now, I'm going to go find the mausoleum, find Klaus and bring him back." Ben said, before turning on his heel and walking out of the room.

Everyone stood in silent agreement and went to go follow Ben. To find Klaus.