As boredom was spreading through the homicide department due to no cases, Detective Carolina Moon finally gets a new case. Showing up at the first murder scene, Carolina discovers the victim relaxing but with a masquerade mask. Upon further looking over the victim, it is seen they are not only dealing with one murderer, but two. With the crime scene completely clear of evidence of who the murderers are, Detective Moon and Detective Artinley realize there is more to the murders when they discover a connection that dates back twenty years when eleven children were abducted, and their cases ran cold. Now knowing they need to find the two killers and the reason behind the killings, Detective Moon and Detective Artinley are racing the clock before the murderers strike again.