Three brazen murders in Kelowna, Vancouver and Toronto spark an extensive police investigation into the Wolfpack Alliance, a crew of gangsters running operations connected to Mexican cartels. The kingpins are quick to take out anyone in their way, leaving authorities scrambling to build a case against the killers.

In 1983, Susan Tice, a 45-year-old mother of four was found raped and stabbed to death in her Toronto home. Four months later, across town, 22-year-old Erin Gilmour returns home from work and is attacked the same way. The women didn't know each other, and both cases remained unsolved for decades. In 2000, DNA profiles from each crime proved their attacker was the same man but didn't reveal his identity. It would take another 20 years, but thanks to genetic genealogy research, the killer was arrested, charged and convicted, bringing a measure of closure for the victims' families.