Masahiko is obsessed with finding a kind girl who helped him during his childhood, though he cannot remember her face. When Sha Fong Lee, a skilled martial artist from America, moves into his home to study under his father, Masahiko hopes she might be the one. Despite an initial clash of personalities, the two form a deep romantic bond through karate training. However, just as they grow close, Fong Lee reveals she is not the girl from his memories and departs for America, leaving Masahiko to continue his lifelong search.