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Linus Sweeney, who is in the spotlight wherever he goes with his sweet looks and a genius brain, and Peter Mack, a natural nerd who tenaciously digs into anything since he was young. Their contact was almost non-existent until Peter achieved his feat of hacking Caltech. Linus throws a party at a famous club to celebrate Peter's great achievement. Except for his hacking technique, the nerdy Peter, grabs Linus' attention. Meanwhile, Linus "kindly" took care of Peter, who had lost conscious due to drugs, which Linus gave him, and alcohol.
The two began to mix, and they spend most of their time together, continuing their relationship for three years. Until one day, Linus turned his back on Peter mercilessly without telling him why.
Eight years later, Peter, who overcame the pain of a broken heart became a CIA agent but he is unexpectedly put on a mission, and encounters an unexpected past that is meeting Linus once again at a mental hospital.
Peter tries to control his past feelings. However, whenever he sees him approaching him and whispering sweet words, his heart shakes.