"The Third Marriage" is a story about a woman named Da Jung. She's happily married and even pregnant, what she doesn't know is that her husband is cheating on her with Se Ran, her best friend. Se Ran is doing that for revenge, she thinks Da Jung's father is responsible for her father's death and wants to take the happiness that Da Jung has, saying that she didn't deserved. The two women ended up pregnant and Se Ran switches the babies, making Da Jung raise her child. That's still just the beginning of the drama, since it's called the third marriage.

Da Jung ends up getting divorced, her father dies and in a horrible twist of fate, Da Jung's daughter Song Yi dies in accident. Da Jung learns that all of this is because of Se Ran, who also tries to kill her. Then Da Jung comes with a plan for revenge and shows up as Se Ran's mother-in-law.
This is exactly what I didn't like. I think the writers should have put Da Jung with Ji Hoon, since he liked her. This whole thing with his father was just weird, since Da Jung has feelings for Yo Han, who's Je Guk's nephew and Je Guk's ex-wife is Da Jung's mother. To complicate things even more, Yo Han's daughter is actually the lost daughter of Da Jung's, who everyone thought was dead.

It was Oh Seung Ah's first time playing the main lead and not the villain, so it took me a while to get used to it.
The fight scenes are amazing, both Da Jung and Se Ran are awesome at that, those moments are so fun. Se Ran really did a lot of bad things: she stole Da Jung's husband, swap the babies, took Da Jung's place as that rich lady's granddaughter, killed Da Jung's father, tried to kill Da Jung, pretended to be pregnant twice, among other things. HAHAHAHA'

The drama's biggest mistake is the lack of romance, there's absolutely none of that between the couple, zero chemistry and I also didn't like what they did with Ji Hoon's character, the poor man only suffered. He had an one-sided love on Da Jung since the beginning, had to see her married his father. Ji Hoon was forced to marry Se Ran and was fooled by her thinking she's pregnant. Then we learn that Ji Hoon was the person that killed Song Yi and he ends up in a wheelchair... it's too much for one person and he wasn't even the bad guy.