A team of scientists descends on the town where the murder took place and they investigate the murder site. Stefano has no idea what he's getting into, but the audience knows and that increases the suspense quotient by several fold. But Avati doesn't give everything away. He keeps plenty of surprises up his sleeve. For example, when Stefano sneaks onto the abandoned property, he discovers surveillance equipment.
Monitors show the face of a man buried in a coffin.
Stefano watches the monitors. However, there is little to be embarrassed about in Zeder . It's not a perfect movie. His attachment to his wife is so weak that he eagerly abandons her so that he can investigate Paolo Zeder's cryptic essay. Nope, there's not much logic there.