Canadian singer-songwriter Patrick Krief is sharing a to-be-released tune, "Heaven Into Rust," exclusively with The Boot's readers as part of the Grace & Tony Greenroom Sessions.

"The song "Heaven Into Rust" is a song about false promise in a dissolved love affair," Krief tells The Boot of the track.

In addition to his keyboardist, Roberto Piccioni, and guitarist, Vincent Appelby, Krief is joined in his home studio in Montreal, Quebec, Canada, for this Greenroom Sessions video by Maia Davies, a fellow Canadian singer-songwriter who is both a solo artist and a member of Montreal-based country band Ladies of the Canyon.

"I met Maia Davis when I was 14 and was asked to play guitar to accompany her in a folk project for a gig at Montreal's Barfly," Krief explains, calling the singer's voice "unique and beautiful." "... I met Roberto Piccioni through a common friend just weeks after he moved to Canada from Pescara, Italy; Vincent was introduced to me by a mutual friend when I had mentioned needing a second guitarist in the project. Both musicians are not only irreplaceable bandmates, but also, they're like brothers to me."

Krief and Davies have remained frequent collaborators: She is featured on his 2012 record, Hundred Thousand Pieces, and will also appear on his upcoming disc, Automatic, on which "Heaven Into Rust" will be included. The new album is expected to be released in early 2016.

Press play on the video above to watch Krief, Davies, Piccioni and Appelby perform "Heaven Into Rust," and check back to The Boot next month for a new Grace & Tony Greenroom Sessions clip.