The SBS period drama “Daebak” ranked No.1 in viewership ratings, defeating its competitors in the 10 p.m. prime-time slot.

The drama, starring hallyu star Jang Keun-suk, Yeo Jin-goo, Choi Min-soo and Lim Ji-yeon, attracted 12.2 percent viewership nationwide in its second episode that went on air Tuesday.

Jang Keun-suk and Yeo Jin-goo (SBS)

KBS2 drama “My Lawyer Mr.Jo,” starring Park Shin-yang, followed in second place with 11.4 percent. MBC drama “Monster,” starring Sung Yu-ri and Kang Ji-hwan, racked in 7 percent nationwide viewership.

Historic drama “Daebak,” which is set in the Joseon era, tells the story of two sons of King Sukjong, Baek Dae-gil, a fictional character played by Jang, and Prince Yeonying who later becomes King Youngjo, played by Yeo.

The drama airs every Monday and Tuesday at 10 p.m. on SBS network.

By Ahn Sung-mi (sahn@heraldcorp.com)