there is no...; I see there isn't...Used after a noun or phrase ending in 가 to express realization or surprise that something is absent or unavailable. It can also occur in expressions such as 수가 없군, meaning “there’s no way to...” or “...can’t be done.” 군 is a plain-style ending, so this expression is generally informal.
KO: 원고가 없군. 글래든 보고서 어딨지?
EN: There’s no manuscript here. Where’s the Gladden report?