A movie is shown of Zelda playing her harp until the sky of darkness swamps over her, causing her to wake up to the nightmare. Impa assures Zelda of the oncoming danger and shows the green hero suit with the blue bandana will be given to someone to take on that mantle of "hero". Zelda and Impa walked on the tall wall of the castle and see Link in training with one of the soldiers in displaying his skill with the shield, sword and the ability to jump as well. But the women were interrupted as a horde of monsters is marching towards the castle. Not before Zelda took one more glance of Link in his soldier uniform.
After Link saw Zelda leave the training ground from the high stone wall, he decides to take a sword and rushes in to prepare for battle.
Link steps into the fray
You start at the front of the castle. Use this opportunity to familiarize yourself with the controls. Go to where Impa is first. For Wii U owners, you'll be stuck with Link throughout, but for 3DS and Switch owners, at some point, Zelda and later Impa will be unlocked later in the game, depending on circumstances.
You should take out the enemy checkpoint on the left side marked on the map with a diamond shape and red color code. Doing this slows the number of enemy troops down. In the midst of the battle, a fairy will join with you in the battle. Her name is Proxi, an homage to Navi from Ocarina of Time, the fairy who guided Link on his adventure.
First duel with Volga
After meeting with Impa, in a matter of minutes, the southern doors of the abandon fort will open. Go in and see the intro of Volga. When battling Volga, his weakness will show in like a hexagon-circle shape. Keep attacking until about halfway through his health. (Unlike the health bars in Dynasty and Samurai Warriors, you have hearts instead.) After Volga is about halfway down in health, a cutscene will play where Impa saves Link just in time before getting burned by Volga. Miraculously, Link's power saves Impa from danger as well before Volga makes his exit.
Race for the bomb
The abandon fort should be fully open now. Continue north, attacking the enemy checkpoint along the way. Remember that you can lock on important foes you need to defeat to complete this level. For example, any boss or important warriors that's attempting to thwart you. Lock on to the Lizalfos and defeat him in order to unlock the north area where a treasure chest can be fund. Go in and open the treasure, and you'll obtain your first special item: the bomb. You need to use the bomb after the minions block your exit with the boulders.
Zelda clearing the West Fort (3DS and Switch only)
At this point, you can change characters. For Wii U owners, just break the boulders with the bomb and join up with Zelda. 3DS and Switch owners need to switch to Zelda, and direct her to the near left fort. Start knocking the minions down. As you do, enemies continuously respawn. Keep going until the base boss appears. Lock on and take him down. Once it's confirmed that you conquered the base, use the bomb to let Link and Impa in.
Base attack!
Once Link, Impa and Zelda join up, use either Link or Zelda to clear the middle fort while the other soldiers take the north east as they are successful as well. Link and Zelda have to reach the Fairy Fountain at the south east while you can also choose Impa to take care of the remaining enemies on the north west where you first got the bombs. Take care of Lizalfos and enemy checkpoints. Use the bomb to get into the fountain. Step on to the circle on the floor, and press the button indicated on the screen to call a Fairy to help you. The cutscene will show fairies gathering bombs and building a giant bomb, which drops and blows the minions to smithereens!
Boss ambush!
Wizzrobe will call on Dodongo before he disappears. Zelda will disappear as well. Go to the center fort for the appearance of Dodongo, crashing into the fort. Just as Link did in Ocarina of Time, you have to throw bombs into the monsters mouth in order to subdue it, before you hack and slash at his weakpoint. Do it about two or three times until Dodongo is defeated. Although it's a victory, Impa realize that this is just a distraction and Zelda just disappeared! In a cutscene, Impa gives Link the Legendary Hero tunic to wear for the upcoming battle.
Skulltulla location
Once you hit 1,000 kills, go to south of the Abandon Fort around the left near the wall where you'll find your first gold skulltulla. You must strike it before times runs out as it disappears from the battlefield.
Unlockables
Completing this stage will unlock "Free Mode", "Adventure Mode" and "Extra Mode" via Nintendo eShop to unlock more characters, items, clothing and so on.