Since childhood, Jihye has been able to see beings that shouldn't be seen. Now an adult living an office life, she still spends her days precariously, never knowing when she might be in danger.
Then one day, on her way home after catching her boyfriend of nine years cheating and breaking up with him, Jihye coincidentally meets a goblin who is searching for the mountain spirit (Sanshinryeong).
The goblin offers to fix her eyes if she helps him find the mountain spirit. With the hope of finally living the ordinary life and everyday routine she longed for, Jihye makes a contract with the goblin.
Beings watch these two from afar or nearby. What is the story behind the goblin and the mountain spirit, and was Jihye's encounter with the goblin truly a coincidence?