"Gekijōban Tsurune: Hajimari no Issha" is a feature-length anime film that serves as a prequel to the "Tsurune" series, exploring the origins of the characters and their connection to the sport of kyudo, Japanese archery. The story centers on Minato Narumiya, a high school student who rediscovers his passion for kyudo after a traumatic incident during a middle school competition caused him to abandon the sport. The film delves into Minato's journey of healing and self-discovery, as well as the relationships he forms with his teammates at Kazemai High School.

The narrative begins with Minato struggling to overcome his fear of shooting arrows, stemming from a past incident where he experienced target panic—a psychological block that prevents him from releasing the arrow. His childhood friend, Seiya Takehaya, encourages him to rejoin the kyudo club, where they are joined by Ryohei Yamanouchi, Nanao Kisaragi, and Kaito Onogi. Together, they form the Kazemai Kyudo Club, aiming to compete in tournaments and improve their skills. The film highlights their camaraderie, individual struggles, and growth as they train under the guidance of their coach, Masaki Takigawa, and his sister, Tomio.

A significant subplot involves Minato's relationship with his mother, Masa, who is a kyudo instructor. Her high expectations and emotional distance create tension, but as Minato reconnects with kyudo, their bond begins to mend. The film also explores the backstories of other characters, such as Seiya's determination to support Minato and Ryohei's journey to find confidence in his abilities. The narrative builds toward the team's first major competition, where they face formidable opponents, including the reigning champions from Kirisaki High School.

The film emphasizes themes of perseverance, teamwork, and overcoming personal challenges. It provides a deeper understanding of the characters' motivations and the emotional stakes behind their dedication to kyudo. By the end, Minato and his teammates have grown closer, both as friends and as archers, setting the stage for their continued development in the main series. The story is a heartfelt exploration of passion, resilience, and the bonds forged through shared experiences in the world of kyudo.