Panic Room

(This idea isn't mine, but I really like it... so yeah) Edda and her friends, Geir and Lily turn eighteen in a week, normally, this is something everyone looks forward to with slight hesitation, but for them, it means a full week of torture and facing their fears. With a 40% survival rate, can they make it out alive and well, or die trying?
((Credit to @winterwatcher27 for the cover! I love it so much thank you!))