After being pushed into a river by the hit-man out to get him, Black makes his way back to the Mahkota masquerade ball in search of his nemesis, 419. Sofia helps Lokman to identify a potential murderer, only to realise the culprit is a man from her past who is seeking justice for his son - a victim of the Seri Setia Mall collapse 20 years ago. The case is linked to Borhan's investigations of a murder that happened two decades ago, while Black is certain it is connected to 419's location.