who is a in season 2 of pll
Pretty Little Liars (season 2) Eventually, Alison is linked to an old doll hospital in town nearby called Brookhaven, and later a rural motel, The Lost Woods Resort. The girls attend a masquerade party, where they plan to confront "-A" who appears to be a woman dressed as The Black Swan from Swan Lake. Spencer, accompanied by Mona, rides out to Lost Woods, while the other girls chase "-A". Spencer and Mona are able to steal the key to one of the rooms, which is revealed to be "-A's" Lair. Mona then reveals to Spencer that she is "-A", while the woman at the costume party was only a decoy. Mona knocks Spencer unconscious, driving her to a nearby cliff. She gives Spencer the option of joining her "-A" Team, or dying.