Kim Do-rim, a successful career woman in her 30s, and Oh Yeon-tae, an aspiring mystery novelist. Do-rim, constantly chasing her career, yearns for a good night's sleep, while Yeon-tae, long isolated as an aspiring novelist, yearns to overcome the limitations of her creative abilities. Two people who have lived completely different lives with no common ground come to travel to the mansion through an invitation from Yeongchunhwa, and inside the mansion, they discover a 'Fantasy Booth' that will make their desires come true...? "Did we... really... do this in the Fantasy Booth?" Will the two be able to fulfill their desires in the mansion?