In the fourth episode of Jigokuraku titled "Hell and Paradise" ("Hölle und Paradies"), the plot intensifies as the focus shifts to exploring the other pairs of executioners and criminals. Alongside thrilling battles, the episode delves into the mysterious nature of the island, offering a captivating experience for fans of the series.

Throughout the episode, Gabimaru and Yamada continue to battle the monstrous inhabitants of the island, showcasing the constant danger and conflict that reigns there. The religiously motivated monsters, which appear to be a mix of Buddhist and Taoist influences, add a touch of mysticism to the island and its inhabitants.

"Hell and Paradise" primarily revolves around the introduction of additional criminal-executioner pairs, each with their own dynamics and personalities. The audience gets a closer look at the already introduced duo Gantetsutsai and Fuchi, as well as the kunoichi Yuzuriha, who brings along two Asaemon—the bookish Senta and Genji. Yuzuriha's cunning nature adds an intriguing layer to the story and keeps viewers on their toes.

Arguably the most gripping new characters are the Aza brothers, Choubei and Touma, voiced masterfully by Kimura Ryouhei and Ono Kensho. Touma infiltrates the Asaemon to be paired with his brother Choubei, and their backstory promises to add more depth to the narrative. Their interactions and the exploration of their relationship will likely be a highlight in future episodes.

Amid the chaos and battles, the talking monsters and dangerous beetles hint at the island's mysterious nature, which seems to be a central plot element. Additionally, Fuchi's skepticism about the feasibility of the mission lends a realistic perspective to the story.