Bo's houseguest Vex unwittingly brings trouble to her doorstep when a Morrigan shows up looking for vengeance; and it's up to humans Kenzi and Lauren to swoop in and save the day for their Fae friends.
Bo won't allow herself to feed, which might be a decision that bites her in the end. At the same time, she and Dyson tap into the world of New Age psychology as they work together on a case; and Kenzi, who feels left out by her friends, shows a vulnerable side.
Bo receives news that's difficult to accept; at the same time, she, Dyson and Kenzi go undercover at an urban camp for at-risk youth in an effort to nab a Fae serial killer who seems to be targeting the kids. Elsewhere, Tasmin encounters a blast from the past.
Bo and Kenzi attempt to entrench themselves in a gated community after a babysitter asks them to investigate the suspicious death of her employer. Elsewhere, Lauren arrives at a difficult, and possibly dangerous, decision.
A daring attack on the Dal Riata bar leaves a life hanging in the balance. Meanwhile, Kenzi and Hale are caught in the crossfire when the Morrigan attempts to ignite tensions between Light Fae and Dark Fae.
In the third-season finale, Bo takes on an army to rescue two people who are dear to her. But while she's off playing hero, those she left behind suddenly find themselves in danger. Meanwhile, Kenzi has an epiphany about Hale; and a clue to Bo's past is revealed to Dyson.