Prologue

SD : Infinite is an elit group from the police of the South Korea. This team is specialized in the emergency response like hostages takings. The SDI is ready to intervene 24h. It also helps the police, for the arrests of dangerous criminals, and sometimes the firemen.
Lee Howon who has just arrived in Seoul is immediately send to the field with the SD : Infinite. He will discover the life of this so special team but above all he will find out why Infinite was created.
And we all know that, in the police life, the danger is always near us.