tvN's upcoming Mon-Tues drama 'Abyss - Soul Revival Marble' has put away its lighthearted, comical teasers for a serious, ominous one, showing some of the first glimpses of the story's frightening serial killer at work. 

In the newly released teaser above, 'Abyss' reveals that Ahn Hyo Seop's character Cha Min is the first victim to be revived with the power of the soul revival marble. With the magical marble in his hand, Cha Min visits his longtime friend Go Se Yeon (played by Park Bo Young) outside her home; however, he ultimately turns away after seeing Se Yeon's lights turn out. 

The next day, it's revealed that Go Se Yeon, a top prosecutor, has been murdered. Cha Min arrives by Se Yeon's corpse with the marble still in hand, begging it to revive Se Yeon. 

Finally, once Se Yeon uses the power of the marble to revive in her new life, she and Cha Min team up to search for the serial killer - only to learn that Cha Min may have saved the serial killer's life in the past?

Make sure to catch veteran actor Lee Sung Jae in the role of a dark, serial killer when 'Abyss' premieres on May 6 at 9:30 PM KST on tvN!