Banished from the peaceful simian Planet E, the mad scientist Dr. Gori and his brutish assistant Karras [Lla in the Japanese version] search for a new planet to rule after Gori's plot to conquer Planet E had been foiled by its government. Coming across the Earth, Gori is captivated by its beauty, but is appalled by its inhabitants' misuse of its environment, leading to severe pollution (a huge topic back when this series was made, since Tokyo was the most polluted city in the world at the time), so mankind must be quickly conquered if this planet is to be inhabitable, so he plots to, ironically, use the very same pollution that's plaguing the Earth to create horrible giant rampaging monsters to wipe out and/or enslave mankind.

Continuation from season 1.

Saionji Hajime serves the wealthy Ijuuin family. He graduated at the top of the London school for butlers. As the perfect butler, housekeeping skills and management of the mansion go without saying. He mastered martial arts and also has knowledge of all sorts of genres including science and history. Saionji has established a firm relationship of trust with Yuriko, the widow of the head of the Ijuuin family. He abides by the wishes of the inquisitive Yuriko and independently investigate difficult case. No matter how capable he is as a butler, he should be an amateur at investigating cases. However, nothing is impossible for Saionji who brilliantly figures out the mystery with his knowledge and skills.

Zhang Yang and Zhu Li An have been blissfully married for seven years, and in order to celebrate the passing of the 'seven-year-itch', the couple organized a grand event with friends and family at a hotel. They expected happiness, but trouble came knocking at the door, when Zhang Yang's ex-girlfriend showed up uninvited at the event, and his close friend and former classmate Long Dong Qiang started scheming behind his back.

Outwardly, Xiao Feng (Ariel Lin) is a stubborn tomboy and the captain of the Kendo Club at her college. In her group of friends, she is the leader with her demanding nature and abrupt ways. Inwardly however, Xiao Feng is a girl scarred by her past and searching for what she wants most, love. Her friends, Ah Kai (Zhang Rui Jia), Xiao Bai (Lai Zhi Wei), Mu Tou (Lin Yi Hong), Xin Lei (Sa Sa), and, Xiao Xiao (Yang Pei Ting) don't know about that part of her past but they are all loyal friends to Xiao Feng; that is, until Xiao Bai and Ah Kai leave the Kendo Club for the Swim Team. Xiao Bai and Ah Kai are immediately regretful when the captain of the Swim Team, Ah Ken, turns out to be a captain as grueling as Xiao Feng. When one night Xiao Feng announces to her friends she wants love the most, Xiao Bai and Ah Ken devise a prank called the love contract. In exchange for finding swim team members to recruit, Ah Ken must court Xiao Feng.

Two young teenagers who are also best friends fall in love.

Yagyu Sekishusai is a consumate swordsman teaching the Yagyu Shinkage style of fencing from his family dojo. His ambition has always been to achieve fame for the Yagyu clan. His son Munenori hangs around with the local ninja children and frequently avoids practice to do so. As a result, the father considers the son to be weak and is harsh and disparaging both in training and personal life. After Munenori's older brother is injured during the Battle of Sekigahara, Sekishusai decides to name his grandson Hyogonosuke as his successor as head of the Yagyu Shinkage school, considering Munenori to be unworthy of the position. Munenori witnesses his 'mutodori' technique of unarmed combat against a weapon-bearing opponent & then sets out to develop his own style based not on the desire to kill but to defend one's self. He becomes a master in his own right while forming a strong alliance with the Tokugawa who ascend to take power in the land. Munenori becomes a highly-placed key vassal for the Tokugawa, initially as sword instructor & then as Minister of Justice. He also helps to institute the draconian policies of suppression designed to quell any opposition to Tokugawa rule thereby bringing peace to the nation. This viewpoint is not appreciated by his son Yagyu Jubei Mitsuyoshi who is opposed to what he sees as underhanded tactics, regardless of their eventual results 'for the greater good'. Father and son must put aside their differences in order to confront a plot that could de-stabilise the country.