Unreliable narrator alert: We Were Liars follows the summer exploits of heiress Cadence Sinclair (Emily Alyn Lind) as she tries to unravel what really happened on her grandfather’s fictional Massachusetts island with her and her best friends (dubbed “the Liars”) after a traumatic brain injury scrambles her memories. The young adult book from author E. Lockhart that the series is based on originally came out in 2014, became a TikTok sensation during the pandemic, and now the small screen adaptation of the YA book is finally set to come out on Prime Video on June 18.

It’s been a long road for Lockhart, who had been eagerly waiting for years for her psychological thriller to be adapted, and is now an executive producer on the series. (She also wrote the finale — and if you know the ending, you know how important that tidbit is!)