 When several patients and the unpopular ER resident Dr. Mason, who acted erratic since a grave accident, are murdered in Community Hospital, the sleuths figure out the killer seems to be striking every hour, so every minute counts to save the next victim. Steve was already inside after bringing in a man who got shot by mistake with two uniformed cops who witnessed it. Several people had opportunity, but nobody seems to benefit from the deaths. After a suspect s alibi checks out, Mark finds an eery point in common: they all survived a near-death experience.