New details on the latest twist in the murder-for-hire plot involving a prominent Florida family that left law professor Dan Markel dead and a grandmother arrested.

When a package bomb explodes at a day spa in Southern California, killing beloved esthetician Ildiko Krajnyak and injuring two clients, law enforcement discovers that the bomb was intended specifically for her. Who would want Ildiko dead? An investigation into her love life reveals several possibilities.

INTERVIEWS WITH: Valerie Stone, FBI agents Nick Vicencia and Ashley Mericle, Orange County Sheriff's Department investigator Jack Ackerman, prosecutors Annamartine Salick and Mark Takla, and others.