The Project B24-9 is an immersive 2-days experience created by 2 researchers and myself, where graduated students make real physics research based on their skills. Through a strong narrative, we are breaking the walls of classic experimental lessons to push them to be innovative and ressourcefull. To accomplish their challenges, they will have to use only their mind and their cellphones! The whole story begins when they are discovering that a strange radioactive source has been discovered on the campus. The 2 days conference they are supposed to attend is cancelled, and as a special science task force, they will have to find the source and unravel the mystery around; that will lead them up to the cold war where a forgotten scientist hid his major discovery in an old particle accelerator.