Sealed With A Secret

Sealed With A Secret summary:

Silver Lynx is a seductive expert spy. His next target is someone who knows the whereabouts of the quantum computer 'Gloria' blueprint, Cha Woonwoo. He pretend to be lover of the target's younger brother Cha Jiwon and disguised as Kwon Eun-chae' and manages to find out that there is a password on the body of the target's younger brother, Cha Jiwon. While lynx is in his mission, he becomes suspicious of Cha Wonwoo and begins to uncover secrets. The tension between them grows and it seems like they're on a collision course.