The video above is the Dying Light Siblings Quest Walkthrough and shows how to complete Siblings, the mission featured in Dying Light, the video-game.
The video walkthrough covers the following objectives:
Meet with Jade in the Boxcar
Find an Entrance into the School
Look for Antizin
Meet Jade in Storage C
Leave the School
Meet with Jade Back at the Tower
Talk to Zere and Quartermaster about the Bolters
Sneak Close to a Bolter and Get a Tissue Sample
Look for Rahim on the Overpass
Check the Train Yard Buildings for Rahim
Look for Rahim
Place the Bombs at the Volatiles’ Nest
Help Rahim Get Back to the Tower
