Hijack Track - recap?

I haven't kept up with DABH especially from the time Sandhya went to Hyderabad for training. I vaguely kept in touch with the general tracks - leaving Pushkar - training for 11 months - taking leave for Chavi's wedding - completing the training program - winning best Cadet award and moving back to Pushkar. Sandhya joins duty as an APS in Pushkar but struggles with duty and family members wanting to take advantage of the perks that come with her profession - kavita expose track and then going to Dubai for the food festival which led to the Hijack track. I think that is the general track progression - if i've missed something please fill me in.

Can anyone give me a general synopsis of the hijack track - what exactly happened? Especially the climax why did Suraj get out of the plane and why is he so mad at Sandhya?

Thanks!