A dimensional fissure occurred on the Earth suddenly, a bunch of mechanical beasts came to the Earth and attacked the city. Sean, who dreams of being a hero, accidently met with the mecha Skyden and they became partners during the attack. They worked together to fight against the enemy. After that, Mechanical beasts attacked the city every now and then. In the process of fighting against the enemy, Sean and Skyden became friends with warm-hearted Duncan, smart Thom and elegant Kay. They found out some relevances of the attackers and it seems that there is a more powerful leader behind them!

As they planing to make a deep research, there was a transfer student named Phil who also possess mecha partner came to Sean’s class. But ever since Phil participated in their team, the mechanical beasts always attack them by focusing their weaknesses. After investigation, they found out that Phil is the undercover of the mechanical beasts! They worked together to find out the truth and helped Phil to realize the truth. And from Phil, they realized that the leader behind those mechanical beasts is Rydenbolt who is strengthening his power and tend to take revenge on human beings by collecting all the scattered evil Blast Core fragments.
In order to stop Rydenbolt’s conspiracy, with the help of the team members’ fathers and the mecha teachers, they were divided into two teams and started to collect the evil Blast Core. 

They defeated the subordinates of Rydenbolt and colleted two pieces of evil Blast Core, however, they were told that there’s still one more fragment to be collected. They gather together and headed to the island to get the third piece of Blast Core. But unfortunately, Rydenbolt recovered and took all the fragments away from them. Sean’s team tried their best to fight but failed at the end and the mecha teacher was sunk in sleep because of trying to rescue them and Lynn was caught by Rydenbolt. 

After that, they realized that there is a great gap between their team and the enemy Rydenbolt, they were frustrated and the whole team was about to be dissolved. However, a bigger crises was coming to them, the base camp of mechanical beasts launched a huge light pillar which absorbs human being’s energy endlessly. Human beings were in danger!

To rescue Lynn and protect the city residents, Sean, Duncan, Thom, Kay and Phil cheered up and worked together with their mecha partner to fight against Rydenbolt. In the fight with Rydenbolt, they overcame their weaknesses and defects and gained new progress and development. With the joint effort and in the spirit of never giving up, guided by their dream of protecting the Earth land, they finally defeated the big boss Rydenbolt.