Kostas Plessas was born in 1975 in Zakynthos, where he lives and works. He studied painting at the Athens School of Fine Arts and graduated in 1999 with honors. He made postgraduate studies in Fine Arts at Middlesex University of London (2001-2002).
He has participated in numerous group exhibitions:
- "4 eyes" in the Gallery of Publications in Peania
- "Seventh Meeting Artists" Didymoteicho (2000)
- «Disco» the Quays Arts Center on the Isle of Wight, England (2003)
- «Urban Arts» in Brixton, London
- «Fine Rooms» the Royal Academy of Arts, London (2004)
- "60 Years of Greek representational painting" at the Frissiras Museum (2004)
- "60 Years after ..." at the Arts Center of the Municipality of Athens (2005)
- "5th Art Festival for Human Rights" in CheapArt of Athens (2006).