drop into place

1. To suddenly make sense. Once he explained the instructions to me more thoroughly, everything dropped into place, and I was able to complete the project. The lesson finally started to drop in place after I re-read the chapter. Wow, you really are a conniving little snake. As I've thought more about the events of the past six months, everything has dropped into place—you were having an affair with my husband that whole time!

2. To produce an ideal or desired outcome. There were a lot of missteps along the way, but all of our plans have finally dropped into place. If everything drops into place, we'll be rich. I know you're stressing over every last detail, but all of the important stuff will drop into place on your actual wedding day, believe me.

fall, drop, etc. into ˈplace

1 because of a new piece of information, the relationship between several events, facts, etc. suddenly becomes clear: When I found out that he was Lucy’s uncle, everything fell into place. ♢ When we got the final result of our experiment, everything slotted into place.
2 (of a complex situation) finally reach a satisfactory conclusion: Last year everything was so difficult; then John changed his job, I started work, the children moved school and everything finally fell into place.