What if mycroft had a daughter and she was a top agent in MI6 and she ends up in a situation where she has to die to save the day and maybe the others like Greg, John and Sherlock are in the room during the last words they exchanged with one another like I love yous.
John could not help hold back his tears as he watched Mycroft say his last goodbye’s to his only daughter Cassandra from behind the aquarium like glass.
It had been a case where Sherlock needed MI6 agents to help him take down a faction of Jim’s old web and Cassandra, a newly minted agent wanting to prove herself eagerly applied to help.
She had studied what had probably been her whole young life just to be a ‘Bond’ agent for the crown. It had been everything Cassie ever wanted to talk about as a young girl.
Cassandra was determined that she would be an MI6 agent. She tirelessly trained for it, harassed Sherlock for gadgets (to which he sometimes supplied), harassed her father for information and begged Greg to get in some training with the yard to beef up her resume.
“Dad, I’m sorry,” Cassandra cried brokenly from the other side of the glass. Her hand pressed hard against where Mycroft’s hand was placed, “ I thought I could do it but I was wrong and you were right. Dad, please forgive me.”
Mycroft of course was set against this from the start not because she was a girl but because Cassie was his baby girl.
“You needn’t start on such perilous missions in your first go,” Mycroft had urged her when Cassie expressed interest in their case, “stick with some safe ones to get your grounding.”
Cassie of course didn’t listen and now she was stuck behind a glass wall where a timed radiation bomb was set to go off. The glass room had been sealed but at a great cost. For to get it secure so that way the surrounding 50 mile radius wouldn’t be infected it had to be closed from both sides.
Sherlock had offered to be the one to close it from the other side, Greg had argued that he had to and John was so busy trying to keep them both from doing something stupid that he didn’t realize that Cassie had snuck by him to close it from the inside.
“Cassandra,” Mycroft uttered her name with such sentiment that John was sure that he was about to break down crying at any second and pressed his forehead closer to his crying daughter,“ This is not you fault but mine. I should have pushed you away from this more-if anything I failed you.”
The worst part is that they couldn’t open the door to even save Cassie’s life now that it was sealed. No amount of hacking from Sherlock or kicking from Greg was going to open that door to save her from the radiation poisoning.
Cassandra Violet Marie Holmes was going to die in a most painful manner before their very eyes and there was nothing they could do about it.
“Dad…dad I’m sacred!” Cassie cries as the numbers on the bomb are getting closer to single digits.
“So am I Cassie, please, stay with me. Look at me and not the bomb,” Mycroft begs her hoping to see her face one more time and see it not painted in fear.
Cassandra is hysterical now as the numbers are going into the final ten and even Sherlock has stopped trying to break into the room in order to stare at his niece with Greg.
There’s nothing they can do.
Mycroft is crying just as poorly as Cassie as the bomb hits zero and sobs even harder as the radiation starts to kill her slowly. How her skin is starting to yellow, her eyes turning red, and how she struggles to breath until she becomes silent.
It becomes to much to bear as Mycroft falls to the ground beside the dying corpse of his daughter bellowing unashamedly.
No one says a thing.
Sherlock doesn’t make any snide remarks, John doesn’t try to offer any condolences, and Greg just punches the wall with tears streaming down his face.
The only noise that’s in the room is Mycroft crying over the dead body of his daughter behind the glass.