SBS Mon/Tues drama "Great Doctor" is entering into the third act with high stakes and the story is advancing at rollercoaster speed.

On Tuesday's episode of "Great Doctor," Choi Young (Lee Min Ho) realizes that Eun Soo (Kim Hee Sun) was poisoned by Duk Heung and his tricks. Now, tthis Monday's episode will showcase a new twist that will surprise the audience.

- Choi Young vs. Duk Heung vs. Ki Chul, Who Will Win?

Before Eun Soo gets any sicker, Choi Young decided to try and take her to the door that brought her here and he even escapes from prison after taking the fall for a crime he didn't commit. He confronts Ki Chul, who is slowly being driven mad by his ambition, along with Duk Heung.

The conflict between the three of them is becoming clearer and the tensions are rising as unexpected events and twists keep constantly happening.

- Choi Young and Eun Soo's Romance

On Tuesday's episode, Choi Young explodes in emotion as his feelings for an Eun Soo who is at danger are exposed. It was a Choi Young we hadn't seen before until now. 

In the last episode, he first revealed his true feelings during a game of truth and the romance will really kick into gear as Choi Young begins to act on those feelings

- Eun Soo's Diary and the Important Evidence

Until she was poisoned by Duk Heung, Eun Soo was fighting to figure out the mystery that was hiding in her notebook. People are curious as to whether a sunspot flare coincides with the opening of the portal that connects the two timelines. There are also questions about the last page of the notebook that was tied with Ki Chul. 

This will be a very important plot point that will be carried out until the end of the story and it provides a very interesting question for the audience to mull over.

An executive said, "It's definitely not an exaggeration to say the third act has begun. The scale will have gotten bigger and the romance will get deeper. So please stay with us until the end of the series."