Everything starts on the birthday of Eun Jae's dad. Eun Jae ran into Park Moo Yul, who is the 2nd baseman of 'Green Dreamers', when she is drunk. Eun Jae who is a fan of 'Blue Seagulls', starts a fight with Moo Yul who led the 'Green Dreamers' to victory. The next day, internet is on fire with the video called 'Humiliated Park Moo Yul'. Because of this video, career of both Moo Yul and Eun Jae, who recently got a job as a bodyguard, are in danger.In the end, they decided to put on a show against the public! They lie that Eun Jae is Moo Yul's private bodyguard and the video was recorded when Eun Jae was giving a self-defence demonstration to Moo Yul. Like this, Eun Jae becomes real bodyguard of Moo Yul. It seemed like everything worked out just fine, but the problem is that they can't stand each other's existence...

Kim Sun Woo, who spent his school days as a troublemaker, decides to make a change in his life and joins the sea special attack team, which is called Poseidon. Sun Woo works as a promising commando, but he unexpectedly becomes entangled in an unsavory incident after 2 years. He is demoted and is sent to a maritime police office in Gunsan city. Sun Woo’s passion cools down and he slowly loses his vision as a maritime policeman. Then one day, Jung Ryul, who has formed a new crime investigation section in Incheon city, visits Sun Woo and asks him to join the team...

Based on the popular manga, Oh Ha Ni is a clumsy student who falls the perfectionist, Baek Seung Jo. However Seung Jo is indifferent towards her and rejects her love. When Ha Ni's house collapses, she and her father move into his long-time friend's house. It turns out that Seung Jo is the friend's son and Ha Ni is given the opportunity to be near the guy she loves. Will she be able to move Seung Jo's heart?..