The Light Between Oceans, Derek Cianfrance’s adaptation of the eponymous M.L. Stedman novel, recently got a fall release as well as its first trailer. In it, the Blue Valentine director guides another couple through an impossible decision: Tom (Michael Fassbender), a World War I veteran, and his wife Isabel (Alicia Vikander), live in isolation as lighthouse keepers on an island off the Australian mainland. When a baby washes ashore in a lifeboat (alongside her dead father), the loving couple decides to raise her in blissful ignorance as their own. But after they meet the girl’s grief-stricken mother (Rachel Weisz), Tom and Isabel disagree on whether or not to reunite the mother and daughter.

The Light Between Oceans hits theaters on September 2, 2016.