Miss Black will soon be replacing Deckard, a police officer who is retiring. He will still be here a few days, to show her the ropes. And they won't be resting: several cases are waiting for them. Obviously, it is more about murders than accidents or suicides. The murderer seems to be following a precise pattern Miss Black and Deckard will have to investigate to discover who the serial killer is and prevent him from killing someone else.

Help them investigating and observe carefully the crime scenes: time is against you!