At a wedding, Seung Jun is introduced to Jae Hyun, whose friendly demeanor initially makes Seung Jun uneasy.

Despite Jae Hyun's messages and concern for Seung Jun, they do not make the latter feel safe and secure. Instead, they trigger negative memories from the past.

Even though past nightmares continue to haunt Seung Jun, he finally becomes willing to accept Jae Hyun's well-meaning intentions.