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Ju-ran, a woman with a perfect life in a perfect house, feels anxious about the strange smell from the backyard. Sang-eun, a pregnant woman who suffers from poverty and domestic violence, hears the news of her husband's sudden death.

Right before his death, Yun-beom shows up at Ju-ran’s house unannounced and mentions the night-fishing meeting with Jae-ho, and Sang-eun later finds out that Yun-beom was in debt. Meanwhile, Ju-ran ends up discovering fingers buried in the backyard...

"Your husband killed my husband." After hearing these shocking words from Sang-eun at Yun-beom’s funeral, Ju-ran begins to find suspicious traces of Jae-ho one by one. Sang-eun finds a picture of Jae-ho and a strange girl together in a mysterious cell phone that Yun-beom hid, and begins to scheme to blackmail Jae-ho for money.

Ju-ran goes to see Sang-eun and suggests the two of them find out the truth about Jae-ho together. Meanwhile, Sang-eun gets a call from Jae-ho, and as Ju-ran secretly watches the two meet, she is confused about which of the two to believe...

The identity of Yun-beom's murderer is finally revealed! While being with Sang-eun, Ju-ran sees a side of Jae-ho that she has never seen, but she decides to protect her family. However, it turns out there is another secret hidden in her house.

With Seung-jae's confession, Ju-ran discovers the truth behind the strange smell and noise, and even Jae-ho's secret. Her entire life is on the brink of collapse. Meanwhile, Sang-eun uncovers a secret hidden in Ju-ran's house on Yun-beom's phone that she has received from the police.

Now that Sang-eun knows about the secret of Ju-ran's family, she blackmails Ju-ran. But Ju-ran gives Sang-eun 200 million won and makes an unexpected proposal…

Sang-eun realizes that she fell into Ju-ran and Jae-ho's trap. But when things go awry, Jae-ho threatens both Ju-ran and Sang-eun, and Ju-ran makes a dangerous decision when she sees his true colors.