
A Trap
Yeo Wool receives a text message from Ms. Doh and goes down to her office. But when she gets there, she finds Ms. Doh lying down on the floor, unconscious. Yeo Wool quickly calls 911, but everyone suspects her because she was the first one to find Ms. Doh. Meanwhile, Na Yoon gives her statement to the police and takes Yi Chan with her.
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More from this season

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.