When shocking new evidence surfaces from the "Bleeding Heart Murder Case," Jenny and Beau team up with Cassie and achieve a major breakthrough; Buck struggles with his moral ambiguity, and cracks begin to form in his and Sunny's marriage.

Jenny and Beau investigate the mysterious death of a rookie smokejumper while Cassie picks apart Walter's story, convinced something isn't adding up. Meanwhile, Emily finds herself at Dewell and Hoyt while trying to keep busy, and Sunny and Buck work to put themselves back together after Walter's arrest, leading her to reveal her biggest secret to Cormac and testing his allegiance in the process.