In the simulated universe of Wonderland, individuals can reconnect with loved ones they can no longer interact with in the real world. Jeong In and Tae Ju, a young couple, find their lives going downhill when Tae Ju falls into a coma. Desperate to see him again, Jeong In turns to Wonderland, where she can meet Tae Ju and rekindle their bond.

Overseeing the events within Wonderland are Harry and Hyun Soo, who meticulously control and shape the experiences of its visitors. Their role is crucial in ensuring that these reunions bring comfort and closure.

Meanwhile, a man in his 40s is deeply affected by the loss of his beloved wife, Bai Li. Struggling to cope with his grief, He seeks solace in Wonderland. There, he requests a reunion with her, hoping to see her again once more and find peace. Through these heart-wrenching encounters, Wonderland becomes a sanctuary for those yearning to reconnect with their past, giving out a bittersweet experience.