What would you do if there was proof of an afterlife? The answer to this question is rivetingly explored in The Discovery, where world-renowned physicist Doctor Thomas Harber (Robert Redford) is able to scientifically prove the existence of an afterlife—but with dire consequences. His estranged son, Will (Jason Segel), tries to confront the situation by returning to the New England–esque island where he grew up. He crosses paths with Isla (Rooney Mara), who's returning to the island for mysterious reasons of her own. The tale unfolds over the ensuing days as the regret of past choices forces these lost characters to reflect on how they've gotten to where they are.