Plot summary
Kenzi attends an art festival and witnesses a friend vanish. Kenzi asks Bo to help her and they discover a den of Alligator Fae led by a Fae named Atticus who appears to threaten to reveal the Fae to the human world. Dyson, with Hale's help, discovers that the Alligator Fae are threatened by a Pied Piper (also referred to within the show as the Slender Man ) who wants them killed to allow for his own political and economic gains. Bo's involvement leads to her bringing the Piper to Atticus and the two face off against each other.
Lauren and Bo's relationship continues to grow. Bo experiences dreams of her attacking others. Trick contacts a Weaver to try to help Bo with her dreams. The Weaver does so and discovers an image of Bo in a monstrous form feeding. Dyson gets a new partner, Tamsin, who is Dark Fae. But the two are immediately at odds with each other and Tamsin accuses Bo of feeding on a Dark Fae and shows evidence to that effect.
Credits
Adapted from Wikipedia contributors, Lost Girl season 3. HTML formatting and reference markers removed.