Nigerian-British singer Sade Adu, who is well known for her 1985 classic song, Sweetest Taboo from the album, Promise, has unveiled her slow-burning new ballad “The Big Unknown,” which features in the end credits of the upcoming Steve McQueen-directed film Widows.

Earlier this year, Sade contributed the song “Flower of the Universe” to Ava DuVernay’s A Wrinkle in Time—it marked her first new track in seven years. Her bandmate Stuart Matthewman revealed that they’ve begun work on a new record. Their last release was 2010’s Soldier of Live.

The Steve McQueen movie which was adapted from the UK crime series of the same name, stars Viola Davis, Daniel Kaluuya, Robert Duvall, and others. The film hits U.S. theaters November 16 and its soundtrack, featuring the film’s score by Hans Zimmer, is out digitally November 16, on CD on November 30, and vinyl on December 28 (via Milan Records).

Sade is known for churning out music at her own pace. She regularly takes long breaks between projects — her last album, Soldier of Love, was released eight years ago — and rarely pops up on the scene.

Watch the lyric video for “The Big Unknown” below: