These action thriller rolling outta the koreallywoo'd filmstudios, its packed with crime, noise,, fights and gunblasting, combine that with a complex plot operation and a portion of great musical score and blend in the cutest cast in the world, then you have a marvel of intesity and joy.
Of course , for a western world viewer its difficult to follow the language and cultural rites that is a good mix of humbleness of the hierarchy, where words and punishment sweeps all and everyone at the step lower than yourself, but thats why i view these south korean films, they are top of the craftmanship and so different even when copycatting holly or bolly-wood blockbusters...
its a film about phishing , or scamming money outta people by use of digital devices such as smartphones, tablets or whatever you may communicate with. A large operation that apex from china with korean collaborators milks money from ''clients'' using a well dictioned script for large team operations luring the person on the other end of the ''line''.
Im not a tech guy, but after what ive read this kind of scam is already stoneage tech, cause now they can use A. I. tech to do the human voice, however a well acted, archtypical korean action thriller with good deeds done, makes the grumpy old man recommend. Manse manse manse...!