A regretful romance of Hae-na, who lost everything in a hellish marriage, and Min-woo, who realizes true love far too late.

Every summer, Se-woon, a freshman in the business administration department who always wanted to run away, ends up getting deeply entangled with Chae-min, a senior he dislikes and the captain of the basketball club, during a summer session class.

Falling Into a Dangerous Love centers on Yun Jae-i, a talented designer who makes a heartbreaking choice to protect her family and unborn child from crushing debt. To shield her lover, Lee Taebin, she pushes him away with a brutal lie. Eight years later, Taebin returns as a ruthless, powerful CEO driven by a deep desire for revenge. However, as their paths cross and secrets about her sick child's true paternity begin to unravel, his quest for vengeance turns into a dangerous obsession and an unstoppable, intense love.