
Someone Is Here
On a rainy day, someone throws a rock and breaks the window of Yeo Wool’s house, and Danny comes to save Yeo Wool and Yi Chan. Meanwhile, Ae Soon is arrested for vandalism as she gets caught watching Yeo Wool in front of her house that night. Therefore, Yeo Wool sets up surveillance cameras at every corner of her house and notices something strange.
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S1 E1
Welcome To Paradise
On a wedding anniversary night, Yeo Wool loses her husband. After one year, Yeo Wool puts everything behind and moves to an island to get her only son Yi Chan accepted in a prestigious school. She tries to settle in and get along with other parents there, but she encounters someone who she never wants to meet again on the school reception day.

S1 E2
An Unfamiliar Place, a New Friend
Yi Chan’s classmates and their mothers completely isolate Yeo Wool and Yi Chan from their gatherings after what happened to him at school. Thankfully, Jae In and her mother reach out to them and spend time together. Meanwhile, Yeo Wool receives a suspicious parcel and a message from an unknown sender.

S1 E3
Secrets & Lies
It’s time for the kids to decide on the school club they wish to join. Yeo Wool chooses to let Yi Chan join a hockey club. On the registration day, she encounters Ji Sun, Do Young, and the other moms. Meanwhile, Yeo Wool continues trying to find out the relationship between her dead husband and Do Young. She hires a private detective to dig into Do Young. Yeo Wool soon receives surprising news from the private detective.

S1 E4
Sleeping With The Enemy
Do Young tells Yeo Wool that she had no choice but to turn a blind eye to Yi Chan's incident because she was afraid to get caught having an affair. However, she’s not the one who locked the locker. Meanwhile, Yeo Wool volunteers to prepare snacks for Camp Day, and Ji Sun throws them away.