Set during the 10th anniversary of Hong Kong's reunification with China, FOG tells the story of Wai, who suffers from a rare amnesia that wipes his memory entirely clean, as he attempts to restart his life and embarks on a journey of self-discovery and redemption.

Deep in the slums of Indonesia, a ruthless crime lord uses the locals as human shields to evade capture. But when an elite tactical unit infiltrates his stronghold, a brutal battle erupts—one that will only end with blood, betrayal, and the fall of a kingpin.