When a best-selling murder mystery author dies from a rare but extremely potent toxin, Detectives Flynn (Kristin Lehman) and Vega (Louis Ferreira) must determine fan from foe. The investigation intensifies when a prime suspect turns out to be a second victim. Further complicating matters, prosecutor Samantha Turner (Laura Mennell) pushes Angie for the truth about her past with Sergeant Cross (Warren Christie). But she also receives a pleasant surprise that will help her make up her mind. Meanwhile, Detective Lucas (Brendan Penny) struggles with his marriage.