The premiere for Season 2 of the FOX drama series “Gotham” is just around the corner. The first glimpse of what lies inside the cave that Bruce Wayne found underneath his father’s office is finally revealed in a new photo.

FOX shared a photo from inside the underground enclave that Bruce (David Mazouz) and his butler Alfred Pennyworth (Sean Pertwee) found at the very end of Season 1. The photo shows the pair looking bewildered as Bruce shines a light into the gaping room.

Not much could be seen from inside the room in the photo but a report from TV Insider stated that this cave is still a far cry from the well-known “Batcave” in the “Batman” comics and films. “What is down there are clues to Thomas Wayne’s secret life and what he was trying to do before being killed,” Mazouz said.

The actor had previously explained that Season 2 will see the young Bruce Wayne develop further into becoming the vigilante philanthropist that is familiar to “Batman” fans. “It changes how he sees Alfred, the criminal side of Gotham, even how he sees his parents,” said Mazouz about the cave.

Season 1 started off with the murder of Bruce’s parents. This was how he first came in contact with the show’s main character, Jim Gordon (Ben McKenzie). When the investigation by the Gotham City Poilce Department failed to progress, Bruce took it upon himself to dig into the case.

After studying his father’s company and its activities, he discovered several anomalies, which he believes might be connected to his death. Bruce confronted the board of directors in Wayne Enterprises about his discoveries and this has led to an attack on Alfred. At the Season 1 finale, the two of them accidentally discovered a secret passage in his father’s office, which leads into the underground chamber.

“Gotham” Season 2 premieres on Monday, Sept. 21 at 8:00 pm on FOX. See the moment when Bruce discovers the cave in the video below: