In Apartment No. 9, a mysterious crime begins to shake things up, as the facts disappear amidst a complex web of relationships and secrets. Officer Hossam, known for his sharp intelligence and determination, takes on the case, determined to uncover the truth, no matter how hidden it is. But the closer he gets to the solution, the more complicated things become. Who is the killer? And what secrets do the walls hide? A story full of suspense and excitement until the last moment!