be on the case

US /bi ɑn ðə keɪs/
UK /bi ɑn ðə keɪs/
"be on the case" picture
1.

menangani masalah, mengurus kasus

to be investigating or dealing with a problem or situation

:
Don't worry about the missing documents, I'm on the case.
Jangan khawatir tentang dokumen yang hilang, saya sedang menanganinya.
The detective assured them he would be on the case immediately.
Detektif itu meyakinkan mereka bahwa dia akan segera menangani kasus itu.