The Tower (2012)

Lee Dae-ho (Kim Sang-kyung) is a single father and manager of the 120 story luxurious landmark building complex, Tower Sky in Yeouido, Seoul. He is an earnest employee liked by his colleagues and is secretly in love with Seo Yoon-hee (Son Ye-jin), a restaurant manager. The owner of the complex, Mr. Jo decides to hold a "White Christmas" party for tenants and VIPs on Christmas Eve, with helicopters circling above, sprinkling snow onto the party. Dae-ho has promised to spend the day at an amusement park with his daughter Ha-na, but had to cancel when he is needed at the party.