Welcome to Waikiki 2 tells the story of Lee Joon Ki (Lee Yi Kyung) who is an actor who has bad luck. He is an unpopular actor and is currently running a guesthouse or inn called “Waikiki”. However, the lodging business that he runs with his friends experiences kebangkurutan.
In order to run his business again, Lee Joon Ki asked his two friends Cha Woo Shik (Kim Sun Ho) and Kook Ki Bong (Shin Hyun Soo) to invest the money into the “Waikiki” guesthouse.
Cha Woo Shik is someone who is picky and has a dream as a singer. While Kook Ki Bong was a famous baseball player.
However, now he actually becomes a player in the minor league. Finally, Cha Woo Shik and Kook Ki Bong were willing to invest their money into the “Waikiki” guesthouse and they ran the business together.