The new romantic drama The Light Between Oceans tells the heartbreaking tale of a lighthouse keeper and his wife who, after going through tragedy, decide to raise a baby they find mysteriously adrift alone in a boat off the shore of their isolated island. The movie is based on M.L. Stedman's heartbreaking debut novel, and shows what happens when good people with good intentions make decisions that have terrible, unexpected consequences.

In this featurette, stars Michael Fassbender and Alicia Vikander, as well as director Derek Cianfrance (The Place Beyond the Pines) discuss the characters' motivations and the great love story behind them.

The Light Between Oceans is in theaters September 2.