In a charming world where witches coexist with ordinary people, a young girl named Kiki embarks on a year of independent life as part of her witch training upon turning thirteen. With her sassy black cat Jiji by her side, Kiki leaves her home to settle in a seaside town, eager to find her place and hone her magical abilities. She discovers that by using her broomstick-flying skills, she can start a courier service. Kiki's Delivery Service promptly takes off, and she meets an array of new faces, such as the kindly Osono who provides her with lodging and support in her bakery and Tombo, a boy fascinated by aviation.

As Kiki navigates the highs and lows of running a business and asserting her independence, she faces various personal challenges that test her confidence and skills. Balancing societal expectations, personal doubts, and the complexities of adolescence, Kiki's journey is filled with important life lessons and memorable encounters that shape her growth. She learns to trust in herself, find joy in helping others, and understand the true essence of her unique abilities. The story beautifully underscores themes of self-discovery, resilience, and the transition from childhood to adulthood in a magical yet heartwarming narrative.