~Yasmin on Instagram: "🎥: we were liars . . During Summer Fifteen, Cadence suffers a mysterious accident that leaves her with severe headaches and memory loss. No one in her family tells her what really happened. Two years later, in Summer Seventeen, Cadence returns to the island to uncover the truth. She notices that everyone is behaving strangely, especially the Liars. As Cadence slowly regains her memories, the shocking truth is revealed: the Liars had planned to burn down the Sinclair famil