The contagion and outbreak genre as typified by Hollywood films such as Outbreak (1995) and Contagion (2011) and a host of B-budget others has a fairly mapped out series of cliches that it runs by. Flu buys into most of these the outbreak from its small unnoticed beginnings; the authorities trying to deny/cover things up; the lone doctor chasing a potential cure in a nail-biting countdown as the military plan to eradicate the entire town to stop the spread. Flu never adds anything particularly new to the mix or does anything to vary the cliches. Much of the plot feels as though it has been taken direct from Outbreak right down to borrowing aspects like the digital effect of germs flying through the air after they are sneezed and infect others to the lone person standing up to defy the military as bombers come to wipe out the city.
The plotting follows conventional patterns, nevertheless director Kim Sung-su does a good job of wheeling around the widescreen imagery the police battering crowds as they riot in a supermarket; the military cordons on the street; the helicopters overhead; the digging of mass graves and Hyuk Jangs almost impossible task of trying to find one person still alive who has the antidote among the thousands of bodies.
Flu starts to come together with modest tension during the scenes at the internment camp. Again, the story is hardly world-shattering but Kim Sung-su wields the stock elements into something that works reasonably well. The big climactic scenes with the crowd defying the military just as they prepare to bomb the city is taken direct from the climax of Outbreak. What is unusual about this I dont know much about South Korean politics, how much power the US military wields in the country or whether this is any accurate representation of the relationship that exists between the two countries is an eyebrow-raising scene where the US military make the abrupt decision to countermand the Korean President and order the destruction of one his own cities and he is meekly required to sit back unable to do anything about it.
Trailer here (no English subs):-