In Psychokinesis, schlubby security guard Seok-heon drinks some extraterrestrial-tainted water and finds he is able to lift and hurl objects with his mind. When his ex-wife is killed by thugs working on a construction project, Seok-heon uses the powers to help out his estranged daughter, who is threatened by the same thugs.
Much of the appeal of this movie comes from a very funny lead performance by Seung-ryong Ryu, who is a goof who just wants to use his power to start a magic act. The slapsticky comedy is counterbalanced by the character's genuine concern and regret for his life choices.
The other notable performance is Yu-mi Jung as a psychopath mob boss. Quirky and ruthless, she is a bracing contrast with the low-key performances by everyone else.
The movie is an interesting mix of broad comedy and dark social commentary. South Korea is portrayed as a country wholly owned by criminals and a complicit police force (director Sang-ho Yeon showed a similarly dark view of cops in Seoul Station).
Psychokinesis takes an interesting approach to the superhero genre. Early superhumans all become heroes or villains. Later superhumans sometimes took the Misfits approach, in which you just deal with your powers and see no reason for heroics. Seok-heon goes the hero route, but only for one person.
Unfortunately the attempt to avoid standard superhero tropes leads in some unconvincing directions. Seok-heon downplays his ability as just this neat thing he can do, and oddly enough everyone goes along with it. Even though he makes no attempt to hide his identity or his power, it doesn't make him especially famous and the government expresses no interest in him. There are certain tropes that keep appearing simply because it's hard to imagine things unspooling any other way.
Still, I found this movie tremendously enjoyable, and as the previous films I've seen from Yeon, it balances its supernatural aspects with grounded, fleshed out characters you root for. (Now that I've watched his recent supernatural films I have to check out his early animated dramas like The Fake).