Where Have All the Children Gone?

17 year-old Brooke wakes up one morning feeling different. She feels sad and depressed unlike her usual peppy self. She walks outside and finds the birds not chirping and the sky greying by the second. A mysterious man comes out of her house and tells her that if she does not collect each of the 10 crystals hidden around the whole neighborhood within 5 hours the children will start taking their lives one by one. For each one dead she gets one more hour. For each crystal she gets an extra 30 minutes. When she finds the first one within 10 minutes she is flabbergasted, but how long will it take to find the rest, will her deepening depression take over before she can find the crystals?