이 있는 건

that there is; the fact that there is

→ 이

phrase Rare #17,088

that there is; the fact that there is 건 is a shortened form of 것은. This expression often appears before 아니(다) to mean “it’s not that there is…”

KO: 별일이 있는 건 아니에요.

EN: It’s not that anything is wrong.