BLACK CAT was a famous underground team in South Korea. When the police department failed to catch the criminals, they sought help from BLACK CAT. And the team worked silently. Even media didn't know about the team. V(Kim Taehyung) and Ark,(Park Jimin) the main characters worked in the team. Being drunk one day when Ark kissed V, it all changed. They started to fall for each other though they didn't want to. But soon V's happiness got ruined when a big secret revealed, sending him in a devastated state. What will happen? Will he be able to love Jimin and the team members after knowing the secret? Will he go against his own team? Highest ranking: 10 (underground) 3(codenames) 1(crimestoppers)