Almost all great talented artists were poor as church mice during their lifetime, and only after death, and especially after dozens or even hundreds of years, their canvases became more expensive. The shadow art business is flourishing, which means there are criminals who are willing to steal valuable paintings from museums. Resonance thefts happen on so often fortunately, but any detective considers it a fortune to solve such a crime. The heroes of the story of The Big Investigation are detectives: Paul, Cynthia and Ryan. They got a high-profile case about theft in the city museum. Unraveling the tangle, they found out that the robbery was not just one person, but an entire organization, which means that they would have to carefully collect evidence.