High school girl who knows when a boy is lying

Based on the Pretty Little Liars series of young adult novels by Sara Shepard, the series follows the lives of four girls — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their queen bee, Alison. One year later, they begin receiving messages from someone using the name "A" who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.

In a fictional city named Amerta in Bali, four students' friendship breaks up when Alissa, their popular and most influential friend, is declared mysteriously lost. One year later Hanna, Ema, Sabrina and Aria finally became reconnected when one by one they began to receive short messages from someone mysteriously named “A” , who threatened to open their dark secrets.

Emma, a kind-hearted foster kid who can't catch a break, finds out she has an identical twin sister, Sutton, who - unlike Emma - was adopted by wealthy parents and is seemingly living an ideal life. After their initial meeting, Sutton talks Emma into stepping into her life for a few days while she pursues a lead on their birth mother. Initially excited to do this favor for her sister, Emma soon learns that Sutton has gone missing and could be in trouble. Now, Emma must decide whether to come clean to Sutton's family and risk her own safety in the hope of uncovering her twin sister's true whereabouts, along with the truth about why they were separated in the first place.

Two friends make a deathly bet over the outcome of a lottery ticket.