Ethan Kath and Alice Glass formed Crystal Castles in 2004. Their compositions include noisy, experimental and often beautiful dance music. Earlier lyrics are often vocal samples and generally meaningless. They took a turn towards social commentary in (III).

Two years after the release of III in October of 2014, Alice Glass announced that she would be leaving the band in pursuit of her own “personal and professional reasons.” Glass also accused Kath of abuse, rape and pedophilia.

Since the departure of Alice, Ethan Kath from Crystal Castles released “Frail” and “Deicide,” accompanied by news that Crystal Castles were getting ready to drop their fourth album, expected to introduce the mysterious “Edith” as the new vocalist for Crystal Castles IV. “Concrete” was released in July of 2016 with its accompanying music video, featuring the Kath’s new partner Edith Frances.

Amnesty (I) was released on August 19, 2016. The digital version of the album lists ten tracks, which were extended to twelve on the physical edition with the addition of “Kept” and “Their Kindness Is Charade.”