Plot:

The drama starts with the war between the Immortal and Demon clan. The heroine(The Demon Lord) captures hero(The Immortal Lord) and have him as a hostage for 100 years. When hero gets to know that his step brother is trying to take his place as The Immortal Lord he comes back and reclaims his position. Heroine who is of Ancient Phoenix bloodline has her flame feather falling off. The Flame Feather falls only when the phoenix meets it's destined one, the have to Dual Cultivate for the new Flame Feather to grow, this will also boosts the phoenix's cultivation base. Hero's ex-fiance cheats on him with his half brother. So when heroine asks the hero to marry her he agrees. Thus starts their love story.

Casting:

1) The ML and FL look heavenly in their costumes
2) The 2nd ML and FL makes people want to beat the crap out of them
3) The child characters also did a very nice job

Scenes I liked:

1) When ML saves FL from 2nd FL
2) Their interactions in Mortal Realm
3) Their final kiss where the ML covers their daughter's eyes