Agricultural scientist Choi Woo Seok felt completely alone and empty in life. After closing his eyes, he unexpectedly wakes up back in his high school days in Napa Valley, California. However, he is immediately greeted by a family grape farm ruined by drought, pests, and bankruptcy.

Refusing to give up in this desperate situation, Woo Seok takes a massive gamble by pooling immigrant support funds and loans to buy the farm. Equipped with his advanced knowledge, he sets out to transform the barren vineyard.