Season 1 of Delightfully Deceitful premiered on May 29, 2023.

Ro-eum and Moo-young have extremely opposite characteristics. The two meet in a case unveiled after 10 years. Ro-eum was falsely accused of murder, and Moo-young is the lawyer of the real criminal. After Ro-eum is released from prison, she earns money by doing what she is best at - fraud. However, Moo-young is nothing but warm and kind to her and always has her back in dangerous situations. Moo-young sees the pain hidden behind Ro-eum's past and does not give up on helping her and teaching her empathy.