For a very long time the earth was covered with ice. Not many peaple have survived.
And, when the ice began to melt and the earth turned green again, the lizard cannibals, who lived in thise land before, were unfrozen and woke up from a very long sleep.

You find yourself in an ancient ruin with some of your servants awaken and hungry. Humans are already exploring the dungeon. Kill them.

The game is a strategy where you can control multiple squads which can move and fight. Your goal is to conquer the humans.
To buy troops in game, search for grey markers on your minimap and move your leader there. A shop menu should appear.