Mercy for None Episode 5

Mercy for None plunges into Seoul's brutal underworld where truth is a currency and loyalty is fleeting. After a fierce power struggle, the city's toughest fighter, Ki Joon, retired from the crime business to avoid clashing with his brother, Ki Seok, who had risen in a rival gang. Fifteen years of peace are shattered when Ki Seok is mysteriously ambushed and killed just before his retirement. Consumed by a cold rage, Ki Joon embarks on a relentless one-man mission to uncover the conspiracy behind his brother's murder. He suspects the main culprit is closer than he thinks, igniting old gang rivalries. This quest for vengeance promises another grisly bloodbath, as Ki Joon seeks answers and unleashes his fury on everyone responsible, leaving no stone unturned in Seoul's dangerous streets.