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Starring Yeo Jin Goo, Lee Yeon Hee, Ahn Jae Hyun, DIA's Jung Chae Yeon, and more, the drama tells the story of Sung Hae Sung (Yeo Jin Goo), a boy who goes missing at 19 years old, then shows up in front of his childhood friend Jung Jung Won (Lee Yeon Hee/Jung Chae Yeon) 12 years later. 

The teaser gives a preview of the tragic moment when Jung Jung Won loses her close friend Sung Hae Sung in what seems to be a car accident as well as a glimpse of Sung Hae Sung's return years later. The production staff has also revealed a new still cut of Sung Hae Sung and Jung Jung Won reuniting for the first time, which you can find below. 

You can catch 'Into the New World' and see the full story when it premieres on July 19 at 10PM KST on SBS!