Min-tae, a former notorious gangster turned peaceful retiree, stumbles upon the gruesome body of his only remaining family member—his younger brother, Seok-tae. With Seok-tae’s wife, Moon-young, missing and considered the prime suspect, Min-tae uncovers a mysterious last phone call between her and an enigmatic novelist. This discovery ignites a relentless quest for the truth, even as his deceitful past crime syndicate and the relentless police close in on him.