When an outlaw gang plunder a small ranch, killing the owners and kidnapping members of the family, they unleash a fury against them and an unrelenting thirst for revenge by former Union soldier Burrell Swope when he discovers the foul acts perpetrated on his family and home. Burrell and his companion-in-arms, Jackson Barnhart, two battle-hardened ex-soldiers, set out on the trail of the gang. Despite many setbacks―at times it seems their quest is going nowhere―the pair track the gang to their lair in an abandoned monastery, where the bloody battle of Desierto de los Leones ensues. When the gun smoke settles, who will be left standing?