A new detective arrives in town and questions the girls about Wilden's death. Meanwhile, Emily worries about the problems "A" is causing for her parents; Hanna is reluctant to accept Caleb's help; and Spencer sets a trap for her sister.

Hanna lands in trouble while trying to protect her mom. Meanwhile, Emily attempts to assist Hanna, but this displeases "A"; Spencer and Toby head to Ravenswood, which turns out to be a very unusual town; and Shana shows up in some unexpected places.