When I saw that the series consists of 29 episodes I was a little discouraged, but the dynamic rhythms pushed me forward and it was a pleasure. Even the opening soundtrack doesn't get boring after listening to it over and over again.

The plot initially revolves around the search for the book of war and the killing of Prince Sado after which the theme shifts to the trade in fake ginseng and the killing of Crown Prince.
After the training of these boys, the small group of new warriors is divided into two: those who side with the prince and those who ally themselves with the assassins. Baek Dong Soo is part of the good guys while Yeon Woo turns his back on them and becomes a real bastard in charge of the assassins.

What did I appreciate?
- At the end of the fifth episode the young people become adults and therefore the actors change. Baek Dong Soo starts to be played by Ji Chang Wook and Yeon Woo by Yoo Seung Ho.
My congratulations on this change because all the new actors were very similar to the younger ones.
- I also liked the team of 3 guys who looked like the 3 Musketeers, while the leader of the assassins looked a lot like Jack Sparrow.
- interesting loves triangles
- Baek Dong Soo goes from an awkward child to a master of swordsmanship and martial arts.

Something I didn't like:
- First: The role of the sword master in this series is disappointing. I thought he will be the most tough character but he proved to be a useless person almost whole time. He stays aside and then mourns his dead friends, he's never there when you need him, he loses the baby then he goes away for 20 years (?)...
- the story goes that the real Prince Sado was not at all the kind person we see here (discordant).
- stupid King, believe everything, says the bastard and concedes everything (events, fights, archery,...), basically a puppet;
- Many warriors have been killed and there are always more and more. Where do they go to find them and recruit them?;
- Ga Ok gets pierced by an arrow and dies, "Jack Sparrow" gets pierced here and there and comes out alive? Nonsense;
- Bad 12th and 13th episodes (many good people died instead of bad guys) how nervous!
- I didn't understand why Yeon Woo wants to be the bad guy at all costs and fights against the people who helped him, even though he sometimes shows compassion and helps them. Being nervous, I admit that looking at how he acted I vented by calling him a "bastard". If the traitor had put his forces at the disposal of good, everyone would have been happy. He made a bad choice that he regrets.
-The Sword Master's daughter becomes a fighter?
-How nervous when they clashed with the bad guys and didn't kill them. In general, I never understood why they don't kill the boss first, instead of wasting strength fighting with the others and then letting the boss escape. Clear example with the son of the Minister of War? Cut off the snake's head.
-I felt sorry for how the story ended. The final "stab" from the third companion, I honestly didn't expect it. It may make sense but equally they could have found another ending.
-Cho Rip should also have been dead, given the blows inflicted on him.