When does Song of the Bandits return?

Song of the Bandits is a South Korean web series directed by Hwang Jun-hyeok, written by Han Jeong-hoon, and starring Kim Nam-gil, Seohyun, Yoo Jae-myung, Lee Hyun-wook, and Lee Ho-jung. Set in 1920s, during turbulent period of Japanese occupation, many people of Joseon fled across the Tumen River to Gando, a land of lawlessness, to fight for independence for Korea. The story is a prelude to the Gando massacre.