One day Elias is doing his duty at the reindeer stable in night shift. The head stableman is sick so elf trainees have taken care of the stable on their own. Elias is the last one at work and is just checking the reindeer's water buckets when he hears a loud siren sound coming outside. Elias rushes to see what has happened.
"I wonder if he remembered to safe lock the door..?" thinks a mouse on the windowsill.