Gus and Jepperd embark on a perilous search for missing persons, their strained alliance tested by escalating tensions. Gus, a young hybrid boy, and Jepperd, a hardened survivor, navigate a post-apocalyptic world where humanity is on the brink of extinction. They face not only the harsh environment and dwindling resources but also the growing distrust between them as they pursue leads on missing individuals. Meanwhile, other survivors, including Singh, Johnny, Lucy, and the enigmatic Walter Fish, confront new dangers and potential sanctuaries, each path fraught with uncertainty and the threat of betrayal.

The narrative of Sweet Tooth, Vol. 4, continues to explore the harsh realities of a post-apocalyptic world through the eyes of its young protagonist, Gus. The growing tension between Gus and Jepperd forms a central dramatic arc, while the introduction of new characters and potential safe havens adds layers of intrigue and danger. The story balances moments of intense action and suspense with quieter explorations of survival and the search for connection. The collected issues delve deeper into the established lore and character dynamics, pushing the narrative towards its next critical phase.