Formed in early 2006 in Tres Cantos, Madrid, A Sangre Fría is a Brutal Oi! Hardcore Old School band with a staunchly ANTINAZI ideology. Originally consisting of Piki on drums, Mario on guitar, Mig on bass, Edward on guitar and vocals, and Xoko on vocals, the band later evolved to include Piki on drums, Mig on bass, Edward on guitar and vocals, and Natxo on vocals before settling on Edward on guitar and vocals, Mig on bass and vocals, and Piki on drums. Influenced by classic Hardcore and Punk styles, A Sangre Fría's music features fast, powerful rhythms, multiple vocalists, and socially conscious lyrics.

Their first homemade recording, "Sin cuchillos no sois nada," was produced in the band's rehearsal space in Tres Cantos. Their debut LP, "En tu cuello," continues to spread their anti-fascist and anti-system message, showcasing A Sangre Fría as a Streetcore band from Madrid with a classic Hardcore edge and a commitment to protest through their music.