Revenge is sweet but deadly. When Jack overhears a conversation about Nazis killings during World War II, he becomes obsessed with tracking down the murderers. After going undercover in a rogue German chatroom of active participants in the war decades ago, his focus is directed at eliminating every one of them. With the aid of the mysterious NH-Group, not only are his goals attained, he and a captivating agent hunt down the top-ranked killers.