While investigating a baffling sex-related murder case, Bo comes into contact with Saskia, a strong, sensuous Succubus who has much to teach her. The two become fast friends, but as they work together to solve the case Saskia reveals her true dark Fae colours, which tests the limits of this newfound friendship... and Bo's own inner bad girl.
Kenzi – feeling a bit left out due to Bo's new gal pal – joins forces with Trick in a race against time to save The Dal Riata.