They plan the murder of your wife, you commit it

August 5th is coming. The day when Vancouver, Canada, has been rocked by an explosion for the past three years, killing one woman each time. This year, however, former police profiler Jefferson Winter is up against the killer.

The wife of a Vancouver millionaire dies in an explosion in her home. She became the third victim of a serial killer who regularly, once a year, always kills one woman on the exact same day. The method of murder is unusual - the perpetrator immobilizes the victim, attaches an explosive to her body and walks away. The bomb is then activated by a person entering the room by opening the door - usually the woman's husband.
Such weirdness is too much for the experienced former FBI profiler Jefferson Winter, who is invited to the case by police officer Laura Anderton. The Vancouver police are at a loss, with very few leads in three years, and getting into the mind of such a perversely methodical killer will be a difficult task. Besides, it's August 4th, and Winter knows that the perpetrator has already spotted another victim.
The killer does not remind the public in any way, he does not issue any statements. He has no demands, no threats, works without witnesses. It can be basically anyone. Can Winter find the stealthy killer before he strikes again?