Brandon Heat and Harry MacDowel are two friends as close as brothers, until one fateful day they receive a violent, harsh reminder of just how cruel the world around them truly is. Before that, their lives were simple and carefree, filled with local scuffles, chasing women, and small-time theft to get by and pass the time. What they failed to grasp was that in this unforgiving world, happiness is fleeting and change is unavoidable.
Then comes Millennion, the largest and most notorious mafia syndicate in the region, which takes Brandon and Harry into its fold, starting them at the very bottom. Harry dreams of climbing the ranks and eventually replacing Big Daddy as the supreme leader of Millennion, while Brandon only wants to support his friend and appease Big Daddy, who has taken custody of the woman Brandon loves.
Based on the third-person shooter video game of the same name, Gungrave is an epic tale of friendship, betrayal, and greed that unfolds over several years, ultimately circling back to the gripping and ominous first episode, all while building toward the story's thrilling climax.