Don't watch it if you don't want any spoilers whatsoever, but for those who are too curious to not watch, check it out above!
The six and a half minute teaser features the leads Jang Na Ra and Seo In Guk both when they're adults and children. The teaser also gives a glimpse to EXO's D.O in an orange uniform in jail as he speaks ominously.
The drama airs on June 22! Will you be watching the premiere?