The band started as an Accept tribute band back in 2003.
Pretty soon they decided to write their own songs and formed the band Rough Diamond.
The band releases 3 EP:s during these early years and in 2012 they release a full length album, “Stories From the Old Days”.
The album was recorded by Mats Hallstensson (House of Shakira), mixed and co-produced by Pontus Norgren (Hammerfall) and Marcus Jidell (Evergrey).

In 2014 the members decided to reform the band and start up with a brand new name since they had changed the lineup and were working on a new album with a different sound.
Kardinal Sin was born.