This is another chapter from the puzzle crime series I am running on my website (you can find two previous puzzles here and here). I asked a real artist to make the illustration for this one and thought it turned out very pretty, so decided to share.
The goal is to find a passcode which is a 4-digit number.
7. The Third Body
Fifteen minutes later Morrow, Flanders, as well as three other police officers were in front of the former mayor’s house. It was a large building, with its own parking lot, a fountain, and everything you could expect from an expensive, luxurious mansion. The five men tried to call Phil one last time and when nobody answered, they broke the door. It didn’t take them long before they found him lying dead in the Claptons’ personal gallery room. He was holding a red rose in his hands.
P.S. The text is mostly to drive the story, focus on the illustration.
P.S.S. I simplified the puzzle a bit - initially the letters on the left spelled "Love".