Shh! It's a secret that I'm watching!
Cha Yu-ri died in an accident five years ago, leaving her husband Cho Gang-hwa to raise their daughter by himself. She becomes a ghost and watches over them until one fateful day she is brought back to life by the deities and told she can become human again if she returns to her place in 49 days. Though her husband has remarried, so she must decide between her or his happiness as she slowly re-integrates back into her old lifestyle.
Cha Yu-ri, a ghost for five years, realizes her daughter can see her. Just as she decides it's time to move on, she is returned to her human form.
Cho Gang-hwa is shaken by the sight of Yu-ri, who's got 49 days to find her rightful place. What's more, Cho Seo-woo has gone missing.
Gang-hwa isn't sure how to reveal that he got remarried. Wanting to protect Seo-woo from lurking ghosts, Yu-ri eyes an opening at the preschool.
Gang-hwa worries when Oh Min-jeong notices that Yu-ri looks familiar. At her new job at the preschool, Yu-ri learns the child ghost's secret.
Yu-ri's human form causes a stir with the ghosts at the columbarium. Yu-ri slips up in front of Gang-hwa and Min-jeong at the preschool.
Min-jeong wakes up with a mysterious face wound, and contemplates a big decision. Meanwhile, Gang-hwa faces disciplinary action at the hospital.
Yu-ri meets Min-jeong about an opportunity. While fulfilling a wish from Jang Pil-seung's family, Yu-ri finds herself in an awkward position.
Yu-ri can't help but notice a ghost and his daughter's unfortunate circumstances, and crosses paths with someone who shouldn't see her.
Determined to kick out an unwanted ghost from Seo-woo's home, Yu-ri starts babysitting her. Gang-hwa makes an upsetting blunder.
With half her allotted days already gone, Yu-ri focuses on taking care of Seo-woo — and Min-jeong. Elsewhere, Gang-hwa and Jeon Eun-suk meet again.
The arrival of an unwelcome guest sets Ms. Mi-dong on edge. Yu-ri, Min-jeong and Go Hyeon-jeong have had enough of the preschool's bullying moms.
Gang-hwa is shocked to hear Seo-woo say Yu-ri's name. Yu-ri grapples with the implications, as well as a threat from the exorcist.
After learning that Yu-ri was by his side all along, Gang-hwa prepares to be honest with Min-jeong. The neighbors gossip about the trio.
Returning to the operating room isn't easy for Gang-hwa. After a day spent with Hyeon-jeong and her family, Yu-ri comes to a tearful realization.
If Yu-ri wants to stay and live, she must go back to her rightful place. As Gang-hwa resolves to make this happen, Min-jeong tells him she's leaving.
The reason why Yu-ri was brought back to life comes to light. With the end of her 49 days imminent, all that remains is for her to make her choice.
