Wonderland is a simulated universe where people can reunite with loved ones with whom they can no longer interact within the real world. Jung Yu Mi and Choi Woo Shik`s characters will control all events that occur within this simulated reality. Suzy and Park Bo Gum play a young couple. When Park Bo Gum’s character falls into a coma, Suzy`s character will request to meet him in Wonderland. Gong Yoo, a husband in his 40s, dearly misses his late wife, Tang Wei, as does his child who cannot forget their mother. Gong Yoo`s character requests a reunion in Wonderland.