Into Thin Air (Traditional Chinese: 人間蒸發) is a TVB modern drama series broadcast in September 2005.

Ko Chung Ching (Michael Miu), an ex-policeman, quit his job to set up a private investigation company two years ago, right after his son Tsun Sing went missing because of a slap while Miu was searching for the "Rose Killer".

His subordinates include Man Kai Ching Super (Power Chan), Man Tai Po (Bernice Liu) and Lam Yan Yan (Vivien Yeo).Kenneth Ma plays the cop who takes on Miu's "Rose Killer" case.

He meets Lai Siu (Melissa Ng) the manager of a group of part-time actors.

Also in the process, Bernice and Kenneth's characters fall into a love triangle with Power, Rebecca Chan (Kenneth's older sister) and Benz Hui (Melissa's dad) have a romance after she dumps her 15-year married man affair.