Poison is the third mini-album by South Korean girl group Secret. Following their Japanese promotions in 2012, TS Entertainment announced that the group will have its comeback in South Korea after almost a year absence in the South Korean music industry. The mini-album was released on September 13, 2012, and contains five tracks, including the title track of the same name.

In August 2012, TS Entertainment announced that after nearly a year absence in the South Korean music scene, Secret would have a comeback in South Korea sometime in September. The song was described as an "upbeat dance track" and was written and produced by Kang Ji Won and Kim Ki Bum whom they previously worked with their previous hit singles. TS Entertainment stated, "'Poison' will have all the unique characteristics and colors of Secret but will have a change in concept from the cute and friendly image [shown in the past] to a sexy and feminine concept. It will be a new leaping point for Secret." TS Entertainment emphasized that the song is "armed with a fresh, new, musical style and a feminine concept". The agency added it planned to show an upgraded level of the bright and healthy woman image the group has been known for in the past.

"Poison" is an uptempo song with influences from R&B, Jazz and Hip-Hop music which utilizes repeating saxophone segments. The song was written and produced by Kang Ji Won and Kim Ki Bum whom Secret had previously worked with their previous singles. The audio mixing for the title track "Poison" was mixed by Grammy Award winning musician Lu Diaz, who have mixed tracks for Pitbull, DJ Khaled and other American artists. And to raise the overall quality of the song, Chris Gehringer (from Sterling Sound) was called in from America for the audio mastering of "Poison". Gehringer has mastered the sounds of world-famous artists such as Madonna, Jason Mraz, Lady Gaga, Rihanna and others. Lyrically, the song describes the protagonist's feelings of being unable to break away even while knowing that as one falls in love, it only ends up becoming poison to the individual.

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Wikipedia