Tonbo Ooi, the protagonist, lost both of her parents in a car accident when she was young and was raised by her grandfather, Gonji Ooi, a fisherman on the island of Kagoshima in the Tokara Islands. Tonbo learns to play golf while using her father's inherited No. 3 iron on the island's three golf courses, which were built by the islanders themselves. The story begins with Igarashi, a man who can no longer work as a professional golfer, visits the unexplored Tokara Islands in Japan in search of a job. Igarashi had given up on playing golf anymore, but his encounter with Tonbo, greatly changed his fate.

After graduating from high school, Ryo Sakamoto started a trainee and overcame many hardships before finally earning his card for the Japan Tour. However, he is still far from achieving his cherished dream of winning the Tour Championship. The experience of qualifying for the British Open provided him with a great deal of food for thought, and it set him on his way to play for the championship. Through the emotional battles with rivals in match play and fierce battles with the world's top players, Ryo grows into a true professional golfer. This is an “epic coming-of-age golf comic,” that realistically depicts the human drama in the world of professional golf. (Source: Golf Digest, translated)