Simply put, I loved Dhoom 2, and ship Sunehri and Aryan very, very hard. So this is basically their story, true to the movie for now, but with a bit of my fluff and details. Not too explicit...This is just fun to write :

Aryan and Sunehri have been happy and free for 4 years. When Jai Dixit goes missing and Ali turns to them for help, how can they refuse? They will need all their skill and daring against an adversary who wants Jai, and them, dead!

Sunehri placed three bullets into Aryan's chest, and everything in her world fell apart. Had she done the right thing? A life of uncertainty is certainly not worth living. Based on Dhoom 2 final scenes, Sunehri/Aryan, featuring Jai Dixit and one OC.