Credit: MBC The drama intensifies in Episode 5 of MBC’s When the Phone Rings. The episode, extended by 10 minutes, promises high-stakes confrontations as Yoo Yeon Seok’s Baek Sa Eon clashes with Heo Nam Jun’s Ji Sang Woo.

All details of the new romantic thriller K-drama 'When the Phone Rings', from plot to the release schedule of its new episodes.

In When the Phone Rings episode 4, the presidential spokesperson Baek Sa Eon learned a big secret about his wife, Hong Hee Joo.

This gripping K-drama follows a mute wife and her cold husband, whose lives change dramatically after a mysterious phone call.