A doctor who can't save lives, a policewoman who can't catch criminals, and an assassin who can't kill—unlikely allies brought together by fate. After failing to protect a key witness in a major drug smuggling case, Interpol officer Xu Guo Ying (Denise Camillia Tan) resigns in disgrace. She crosses paths with funeral planner Wang Yu Xuan (Sheryl Ang) and arcade worker Chen Zhi Ming (Desmond Tan), and the three form a team dedicated to finding missing witnesses in unsolved cases.

As they grow closer and form a deep bond, dark secrets from their pasts begin to surface. Each is hiding something—and when the truth comes to light, their friendship and mission are put to the test. Can they overcome their failures and uncover the truth, or will their pasts destroy them?