Manufacturing just 50 grams of meth in China will earn you a death sentence. Timmy Choi (Louis Koo) just got caught making tons. Now he's in the custody of Captain Zhang (Sun Honglei), and has one chance to avoid execution - turn informant and help the cops bring down the powerful cartel he’s been cooking for. Over the next 72 sleepless hours, the sting spins out of control, the line between duty and recklessness is blurred, and it becomes unclear who actually has the upper hand. From Johnnie To, master of the Hong Kong crime thriller, comes an unnerving thrill ride through the modern criminal underworld.