My ceiling leak

Well, the plumber came out early Saturday. Cut a hole in the ceiling in the den to try to find it. Thought it was the toilet upstairs in the hall. After replacing all the seals, screws, and tubes, it was still leaking. So he cut a hole in the wall in the hall bathroom between the tub and the toilet. It turns out it was the master bath. (They're back to back.) The caulk on the wall at the shower door apparently is gone, so when we shower the water pools at that corner.. then drips down the wall. Urk. Gotta take the shower doors down and recaulk the whole thing.