"Iku Ka Mo" is a manga series that explores themes of survival, human resilience, and the complexities of relationships in the face of an apocalyptic scenario. The narrative is set in a world where humanity is on the brink of extinction due to a mysterious and catastrophic event. The story centers on a group of survivors who must navigate the dangers of their new reality while grappling with their own fears, desires, and moral dilemmas.

The protagonist, a young woman named Kaede, emerges as a key figure in the group. Her resourcefulness and determination make her a natural leader, though she struggles with the weight of responsibility and the trauma of losing loved ones. Alongside her is Hiroshi, a pragmatic and skilled individual who often clashes with Kaede over decisions but remains a loyal ally. The group also includes Yumi, a compassionate yet vulnerable character who provides emotional support, and Tetsuo, a former soldier whose expertise in combat proves invaluable but whose past actions cast a shadow over his trustworthiness.

As the survivors journey through desolate landscapes, they encounter other groups of people, some cooperative and others hostile. These interactions highlight the fragility of human connections in a world where survival often takes precedence over morality. The group faces numerous challenges, including scarce resources, environmental hazards, and the constant threat of violence from both external forces and internal conflicts. The narrative delves into the psychological toll of their circumstances, examining how fear, guilt, and hope shape their decisions.

The plot is driven by the group's search for a rumored safe haven, a place where they might rebuild their lives. This quest is fraught with uncertainty, as the characters must confront not only external threats but also their own doubts and insecurities. The story balances moments of intense action with quieter, introspective scenes that reveal the characters' inner struggles and evolving relationships.

"Iku Ka Mo" is notable for its exploration of human nature under extreme conditions, presenting a nuanced portrayal of its characters and their choices. The manga avoids simplistic moral judgments, instead offering a complex and often ambiguous view of survival and morality. The narrative builds tension through its unpredictable twists and the ever-present sense of danger, keeping readers engaged with its blend of emotional depth and high-stakes drama.