Revenge of the Chancellor: Part One

After school was finished for the night, Twilight was about to go to bed. Suddenly, she and her friends heard the alarms ringing and chirping in the student dorms. They were unable to get in quickly, because the doors were barricaded. Soon, two pegasus students dragged the barricades away, and opened the doors. They were coughing hard, and many of the students were feeling lightheaded. Others were passed out on the floor, and there was a yellowish smoke in the air. Twilight looked down the hall, and immediately had a panic attack. The window was shattered and the students from other races were GONE, including Sandbar. Rainbow saw a canister that seemed to be the origin of the smoke. Silently, she picked it up, and sniffed the residue of its contents. She felt dizzy for a moment, but snapped out of the daze in a split second.

"Sleeping Gas.", she said calmly as she gingerly handed the canister to Twilight.

Twilight sent an urgent scroll to Celestia.

Celestia,
There has been a break-in at the Friendship School, and the special students have disappeared. However, the window is shattered inward, which means they've been captured. Sandbar was taken too. Please Help!
Signed, Twilight Sparkle