25 years ago, Mi-Hee was an ordinary housewife, married to Chul-Joong with a son. Suddenly, her husband died and her son went missing. This all took place at their house. Mi-Hee was imprisoned for 25 years. She is released from prison and goes back to the home where everything took place.

Adapted from the webtoon series "Welcome", this TV series tells the story of graphic designer Kim Sol Ah who brings home a cat, unaware that the animal can turn into a human being.

When his abducted brother returns seemingly a different man with no memory of the past 19 days, Jin-seok chases after the truth behind the kidnapping.