Lies Hidden in My Garden is a suspenseful psychological thriller that follows the lives of two women who lead completely different lives. Moon Joo-ran is a woman who lives in a picturesque house with a perfect family, but her life begins to unravel when she detects a strange, foul odor emanating from her backyard. This discovery leads her to question the reality of her seemingly idyllic existence and the true nature of her husband, Park Jae-ho. Meanwhile, Chu Sang-eun is a victim of domestic violence who dreams of escaping her miserable reality. When she unexpectedly encounters Joo-ran, their paths collide, setting off a chain of events that exposes deep-seated secrets, lies, and the dark truths hidden behind the facade of a happy home. As the two women become entangled, they must confront the consequences of their choices and the dangerous men who control their lives.