In the third act—where all the little stories connect into one big one—Salem is facing a silent threat: a secret that EJ DiMera is hiding, involving a lab, a forbidden project, and people who could die if the truth is exposed.

The drama opens with a shock: Marlena Evans collapses in the middle of a patient checkup.

Sarah Horton rushes Marlena into the hospital, the monitor flashing red, and John stands outside in the hallway, pale.

The doctors can’t pinpoint the cause—and that’s even scarier than the symptoms.

While the family panics, EJ shows signs of something unusual: he leaves the hospital, receives a secret call, and says only three words: “Do not reveal it.” Viewers can guess: this is not a normal illness.

Tony DiMera also makes people worry when he becomes mysterious. He speaks nonsense, stands in strange places in the house, as if watching something off-camera. Many people think Tony knows about it — but dares not say it. Some sources report that Tony once saw EJ go to an underground lab under the old DiMera estate — where Stefano used to do top-secret research projects.

When both Marlena and Tony show signs of something unusual, Sarah begins to suspect: is someone in the DiMera family hiding dark experiments? Is EJ continuing Stefano’s project? And what Marlena inhales, touches, or comes into contact with… is related to the substance that the lab produces?

A chilling scene is depicted: EJ stands alone in a dark room, opens his laptop with a file titled “Legacy Program – Phase 2.” As the light from the screen shines on, EJ’s face is not one of regret — but of fear that he can’t control what he’s started.