Those who choose to look only at the promotional material for Pretty Little Liars may not realize the true breadth of this show's capability for some truly ingenious plot twists. The 2010 drama series followed a friend group composed of four teenage girls, Hanna Marin, Emily Fields, Spencer Hastings, and Aria Montgomery, who are left reeling when, in the wake of their friend Alison DiLaurentis's disappearance and death, they are taunted with threats that incorporate secrets only known by Alison.
Source：https://www.cbr.com/pll-best-plot-twists-ranked/
