Fourteen-year-old Yukio "Koyuki" Tanaka is dispirited with no goals in life until he saves a mysterious dog named Beck from bullies. The owner, 16-year-old Ryuusuke "Ray" Minami, is an emerging guitarist and former member of a popular rock band. After meeting Ray at a diner, Koyuki discovers his passion for guitar and decides to join the band while supporting Ray's dream of leading the ultimate rock group. Together with Ray's sister Maho, they form BECK and embark on their journey in the world of rock music.
A teenage boy, disillusioned with his life, receives an unexpected encounter ...