Sam, an anxious soon-to-be-father, prepares for a Memorial Day party as he cares for his vegetative dad, William. When his nephew, Paul, expresses interest in William's war medals, Sam suspects Paul will do anything to acquire the medals, even kill him.

Armed with an explosive powerful ancient cross amulet, Callan is back with his extraordinary team of weapons experts to defend Los Angeles from its biggest threat yet—super villains Muerte and Drago. Callan will have to join forces with his once mortal enemy, Gunnar, to try to save the city.