FIRST LOOK: THE TRAILER AND POSTER FOR LIGHTS OUT.

From producer James Wan (“The Conjuring”) comes a tale of an unknown terror that lurks in the dark.

When Rebecca left home, she thought she left her childhood fears behind. Growing up, she was never really sure of what was and wasn’t real when the lights went out…and now her little brother, Martin, is experiencing the same unexplained and terrifying events that had once tested her sanity and threatened her safety. A frightening entity with a mysterious attachment to their mother, Sophie, has reemerged.

But this time, as Rebecca gets closer to unlocking the truth, there is no denying that all their lives are in danger…once the lights go out.

The film stars Teresa Palmer (“Triple 9”) as Rebecca; Gabriel Bateman (“Annabelle”) as Martin; Billy Burke (the “Twilight” franchise) as Martin’s father, Paul; Alexander DiPersia (“Forever”) as Rebecca’s boyfriend, Bret; and Maria Bello (“Prisoners”) as Sophie.

“Lights Out” marks the feature film directorial debut of David F. Sandberg, who directed the film from a screenplay by Eric Heisserer (“Final Destination 5”), based on Sandberg’s own short film. James Wan, Lawrence Grey and Heisserer produced the film, with Walter Hamada, Dave Neustadter and Richard Brener serving as executive producers.

Sandberg’s behind-the-scenes team included director of photography Marc Spicer (“Furious 7”), production designer Jennifer Spence (the “Insidious” films), editor Kirk Morri (“The Conjuring”) and costume designer Kristin M. Burke (“The Conjuring”). The music is composed by Benjamin Wallfisch.

New Line Cinema presents a Grey Matter/Atomic Monster production, “Lights Out.” Slated for release on July 22, 2016, the film will be distributed by Warner Bros. Pictures, a Warner Bros. Entertainment Company.