What just happened? Can anyone explain?

They are investigating the case where butler Choi who was not an alpha, went into pheromone overdrive and blew up. This was caused by a substance. In the case of the last scene, Sae-in discovers that the CCTV point of view is hidden in between the pot of flowers that has been around since early on in the chapters.
The dream of his mom might be a conception dream, but idk.
But, I am just as clueless as to what ML and his secretary are planning as well if that's what you're asking. Lol

Thanka a bunch lmak