Set in a fantasy world after the defeat of the Demon King, the story follows the elf mage Frieren, a member of the hero party that vanquished the threat. Because elves live for thousands of years, Frieren experiences time differently than her human companions, viewing a decade-long journey as a mere blink of an eye. Decades after their victory, Frieren witnesses the old-age death of Himmel, the hero she once traveled with. Overwhelmed by sudden regret that she never took the time to truly understand humans, Frieren embarks on a new journey to retrace the path of their original quest, accompanied by her human apprentice Fern and the warrior Stark. Along the way, she confronts lingering memories of the past, battles residual demonic threats, and slowly learns the true value of human mortality and emotional connection.