Dimension 3000 - the dimension that all the Avengers movies happened.
Dimension 3025 - the dimension that Nova is from.
Dimension 4000 - the dimension that Mephisto is from.
Prologue:
"Mother, I don't want to go." Nova cried.
She was just a kid and she was being thrown away from Asgard. Frigga's heart broke at the sight of her daughter. She bent down and hugged her. They both couldn't hold their tears. The fate was separating them.
"I am sorry my little girl. I tried everything, but nothing works. Be fine for me, okay? " Frigga said.
"Enough." Odin shouted at the crying mother and daughter. "Guards, take her to the Bifrost and then give her to Hel."
With that words the guards came and pulled the girl away from Frigga's arms. Nova was doing everything to stay with her mother, but she couldn't beat the strong guards and her little fingers were cruelly separated from her mothers'.