SATURDAY. The trip has already turned tragic, three people dead, several suspects, and the Portuguese police stationed at the Hotel Marqués in search of answers. Just when tempers begin to settle, Daniel and Pilar come face to face with danger, and in this atmosphere, chaos takes over the group. Everyone's a suspect in everyone else's eyes. Daniel risks everything to solve the mystery.

MONDAY. The trip comes to an end, and our investigators unveil their case in grand fashion, on a theater stage. Daniel returns and becomes the star. The pasts of Fernando, Inspector Gonçalo, the Marquis of Pombal, and the treasure of the music box trigger a new earthquake reminiscent of 1755. The rest of Lisbon is fine, but the theater trembles as our investigators finally reveal the mystery.