In a gripping tale of betrayal and vengeance, "Breathe Deeply, You're Doing Great" follows the aftermath of a tragic bombing in Burma that claims the lives of Korean officials. A covert operation, "Clean Sweep," is launched to retaliate against North Korea, but the operatives are ultimately betrayed by their own government, leaving only one survivor. This survivor raises his son, Yoon-sung, in Southeast Asia, grooming him to avenge the fallen. Years later, Yoon-sung returns to Korea, armed with a lethal skill set and a burning desire for justice, aiming to punish those responsible for his father's death. The narrative weaves a complex story of loyalty, sacrifice, and the quest for retribution against a backdrop of political intrigue and familial bonds.