"One Step Away" is a famous Spanish tango song. "One Step Away" is the Chinese translation of the Spanish "Por una Cabeza". It was composed by Argentinian singer Carlos Gardel in 1935 and the lyrics were written by Yafado Lepera. "Por una Cabeza" in Spanish is originally a term for horse racing, which means "one (horse) head short" in length. It is used in songs to express regret for the complicated and difficult relationship between lovers.
The following provides the violin quartet score of "One Step Away":