Sectu was formed in 2005 by Stefan Lundgren (Necromicon, Sobre Nocturne) and was initially known as Cimmerian Dome.

Early in 2006, Peter Nagy-Eklöf (Mörk Gryning, Eternal Oath) joined in as a drummer, but it was soon decided that he would share the vocals with Stefan and play the bass. Later, the band recruited the amazing drummer Calle Bäckström (CB Murdoc) and in 2008 the band performed at the renowned Metal Town Festival in Gothenburg, Sweden. After some line-up changes the band started writing material for a full-length album and changed the name to Sectu. Inundate was released May 2011 by ViciSolum Production.

Since early 2011 Guitar virtuoso Anders Ericson from the acclaimed Danish band Beyond Twilight is now a part of the line-up as well. Johan Niemann (known from bands such as Evergrey, Therion, et.c.) joined in right after the recordings of the album Gerra.

Praised in the press for their debut album, Sectu is now ready to spread their gospel with a very strong line-up.