There was an old abandoned laboratorium in the forest, nearby your neighbourhood. Youve had heard lots of creepy stories of the lab, such people hearing screaming, crying, footstep sounds, doors shutting.

one day, after all the theories about the missing people being connected towards the laboratorium, people sent you there to investigate. To put it to an end. To see if anyone was actually there. You needed to get back before sunrise, with as much information you could get.