Rutherford is an engineering graduate and is jobless. He's in love with lee young-ae, a software developer in a reputed firm. He confronts his father that he wants to marry her. Initially thinking it as a joke, he later realizes that his son is serious about it and the family goes to fix an alliance. Rutherford's father doesn't want him to get married to lee young-ae as he's unemployed. Rutherford's father talks to him in private and tells him that her mother has pancreatic cancer and will not survive for more than an year. Which is why, he wants her mother to see lee young-ae get married. Rutherford's father agrees. They get married and start a new life.
In the initial days of their marriage life, Rutherford and lee young-ae are totally happy and loving. One day, lee young-ae sees a notice that her company has some job openings and asks Rutherford to apply for it. He does it and through lee young-ae, he gets called for an interview. He performs really well in the interview and the interviewer, richan, is impressed thus, clearing Rutherford for on boarding. While richan is on his way to submit the new recruitment files, he's stopped by the assistant manager, Billy boy who lusts lee young-ae and tears Rutherford's documents for on boarding. He promises richan an on site job in the US and asks him not to recruit Rutherford. When the CEO asks richan about the new recruitments, he deliberately insults Rutherford in-front of lee young-ae. Disturbed, she returns home in a very angry mood and starts to yell at Rutherford for not behaving responsibly and also for not getting the job. He gets hurt and consumes alcohol with his friend and gets caught by the police under drink & drive case. The next day, lee young-ae comes and relieves him from the police station by filling up the formalities. Meanwhile, lee young-ae receives vulgar texts from an unknown number and with the help of her friend, she gets to know that it's Billy boy. She warns him not to repeat it. Nevertheless, Billy boy remains the same.
A few days later, lee young-ae's friend tells her to ask Rutherford to go to a job consultancy firm that promises a respectable job in some company. lee young-ae asks Rutherford to do so and he does it but, the consultancy demands an amount of 1,00,000 dollar for the job. He tells this to lee young-ae and she takes loan from a bank and asks Rutherford to collect the money and pay the consultancy. After he takes the money from the bank, he gets robbed. He chases the thief but in vain. He gets stuck and is scared to tell this to lee young-ae. He decides to take up a cab driver job that one of his friends has as a side income and pay off the EMI. To manage lee young-ae, he gets a fake ID card and offer letter from the same company his friend works in. lee young-ae is impressed and is totally happy for Rutherford. Rutherford drops her at the office everyday and pretends to go to his office only to take up the cab driver job. One day, a man, rigi, takes his cab and tells that he has a telephonic interview. He receives the call mid of the journey and asks Rutherford to take the call as he isn't confident. Rutherford takes the interview pretending to be rigi and gives his best thus, clearing rigi's interview. They celebrate and he gets a call from lee young-ae that she's at his office. He rushes to his friend's office and asks him to manage lee young-ae somehow till he reaches. He comes just in time and they share a caring moment.
The next day, Billy boy asks lee young-ae to do overtime via richan. She does it, having no other go. She returns home tired and disturbed. Rutherford goes through her phone and sees Billy boy's indecent messages. He immediately rushes to find him and thrashes him. He also warns him to leave lee young-ae alone. In order to take revenge, Billy boy hires some goons and asks them to follow Rutherford and beat him up. They call Billy boy and inform him that he is working as a cab driver. Billy boy decides to spill this to lee young-ae. He arranges a team meeting and presents Rutherford and his cab driver media making lee young-ae go out of control. She confronts him and parts ways with him telling him that she couldn't even stay one year with him.
A few days later, Rutherford informs lee young-ae that her mother died. They attend the funeral and later, her father starts consuming alcohol again after many years. When confronted, he tells her how her mother was the only supportive person throughout his life even when he had nothing and lost millions in business. He also tells her that before calling Rutherford's family for the alliance, he talked to Rutherford about their marriage. Rutherford initially denied marrying her as he's jobless and feels that he needs to be responsible to get married. When lee young-ae's father tells him that her mother has very less time to live, he immediately agrees and understands the pain of her father which makes her father realize how good of a person he is. lee young-ae feels bad because of how she misunderstood Rutherford and goes to him. Meanwhile, the on site job that Billy boy promised to Richan is given to some girl under Billy boy. Richan confronts Billy boy about this and gets slapped by him in the argument.
On her way back to Rutherford, lee young-ae receives a call from Richan telling her everything that happened with Rutherford's job at their office and also about the thrashing Rutherford gave to Billy boy. She feels immense regret and apologizes to Rutherford. They reconcile happily. lee young-ae goes back to her office and slaps Billy boy twice for the things he has done. She leaves the job and tells Rutherford that they both will go on job trials from the next day.
Couple days later, Rutherford goes for an interview. He gets called by the CEO to his cabin. There, he finds rigi in the CEO position of that company. When asked how he landed there, rigi tells him that his father-in-law has asked rigi to get a software job just to prove his talent so that he can handover his company to him which he did get because of Rutherford's help the other day. rigi offers Rutherford a good position in his company.