Matze and Paulina can hardly believe it: There has been a break-in at the church. Additionally, someone has spray-painted graffiti on the outer wall, and all of this just before their first communion. How mean is that?! Together with their schoolmate Mustafa, the two set out to find the graffiti artist, as he must have seen the burglar. But will the three friends manage to solve the case in time for the first communion?.