Our university went into lockdown for seven days, and we found ourselves trapped in a rules-based horror scenario. Anyone who broke the rules died instantly, and three people in the crowd had already died the night before. As the death toll climbed, we received clues: the dead would lie, their memories stopped at the day they died, and a ghost was hiding deep among us… I used the clues to catch the last ghost. But after I finally boarded the Number 17 bus out of there, I realized the ghost had been by my side all along.