In the future, an epic battle between Rama's army and Tosakan army of giant robots ended with total destruction on both sides. The battlefield is now junkyard and becomes goldmine for junk merchants. But million days has passed, the friendship and adventure of two robots, who completely opposite in every way, has begun.
The bigger one is "Na Keaw", named after his body color and appearance, the small one is "Jao Puak" mini-size robot that, according to junk merchant, has no value. The pair has dug up and finds out that they've lost their memory. Moreover, they're tied together by magical chain that cannot be broken. After their mishap in the result of destroying junkyard city, being chained together mean that they have to be with each other 24 hours a day.
At first they feel like spare part to each other, but after few adventures that make them a reluctant hero, Na Keaw and Jao Puak become friend and more like missing part to each other. But one day, after they wholeheartedly trust each other, they find out about whom they really are and the task they must do. They have to make a decision, do they continue as friends or become the old self once again? They must choose between being friend or nemesis forever.