What to know about the harrowing twist ending of Amazon's eight-episode adaptation of E. Lockhart's bestselling 2014 novel.

The Sinclair family seems to have it all, except something happened during Summer Sixteen, and Cadence needs to remember it ...

Premieres on June 18 . Based on the best-selling novel by E. Lockhart, the series follows Cadence Sinclair Eastman and her ...