The drama revolves around the duties of Korean Coast Guard officers on rescues, terrorism threats, and other special missions; and their obstacles in life and love.

It's clear that the woman's murder was committed by crime boss Choi Hee-gon, but evidence is still lacking for his arrest.

3 years later, Jung-ryool appears obsessed with his job, trying to forget the guilt he feels over the death of his wife.

With the help of Hyun Hye-jung (Jin Hee-kyung) and a director of the maritime police, Jung-ryool forms another special investigation team.

The abduction of Kang Eun-chul brings back memories of the slain police officer several years earlier.

[6] Production company Annex Telecom transferred to a different network KBS, and filming resumed in August 2011 with the casting of Choi Siwon and Lee Si-young.

[7][8] Source: TNmS Media Korea The series was sold to seven countries in Asia, including Japan, China and Taiwan.