Assault of Darkness

Assault of Darkness, also known as Legend of the Bog, is a 2009 Irish horror film by the production company Bog Bodies surrounding local lore in the swamplands outside of Dublin Ireland. The films plot follows six strangers who come across an ancient evil in the murky bog and are pitted in a fight for survival. Each of the travelers has a tale of heroism that seemingly links them to the situation, and only a local Archaeologist has the theories that may be able to save their lives.

Source: Wikipedia