Tortoise, a street thug with a hard life, happens to land a big mission, which he considers a ‘game changing’ chance; an opportunity to go from rags to riches. He volunteers to set up Hare to bring the liver of Hare for his big boss the Dragon King, who needs a transplant. As the fate would have it, however, he finds out that Hare is actually his childhood friend from the orphanage and Tortoise's sister owes Hare a lot from a long time ago. Torn between friendship and ‘a better life’, Tortoise is faced with a life and death choice.

Dr. Shin succeeded in creating a robot called "Aribot", an artificial intelligence that can communicate with nature. In the world where rain has stopped, more and more people are pursuing Aribot, as it's the only way for it to rain again. Dr. Shin eventually gives up and goes into a rural temple to hide. While staying in the temple, Aribot listened to Dr. Shin's past love stories. The robot felt the lovers' love, the immature expressions, the breakup due to mistakes, as well as the regret. While Aribot was being upgraded with various emotions, it was eventually caught by 'X', the mysterious being who is in a persistent pursuit of Aribot.