BG3 Quest Guide: Kagha's Investigation Questline!
There is a "hidden" questline involving Kagha that is started by finding her secret chest in the Druid's Hideout within the Emerald Grove.
Doing this can also get you access to Sylvanus' statuette so that you can give it to Mol or keep it for yourself. I try to be as spoiler free as possible. There are some minor swamp spoilers.
Small error near the end. I meant to say Zevlor, not Zorru, so I edited it in.