Not recommended...
A Top Gun (1986) ripoff with predictable Korean slapstick humour, poor excuse for drama and plenty of corny slow motion sequences. Commendable air combat action but it's ridiculous how a simple no-brainer plot (with North Korea as the bad guys, they always are) could still have so many flaws. There are even scenes that look like advertisements for their very notable sponsors (the bike, the phones, the camera, Chivas, etc). Soar into the Sun is only recommended for the fans of Rain and Shin Se Syung, and to those who has never heard of Top Gun.
Review with spoilers here: http://www.colourlessopinions.com/2012/11/soar-into-sun-kr.html