Japanese: Really はぃつもつ!

"There is only one truth (forever)!" Kudou Shinichi/Edogawa Conan, the protagonist in the Japanese anime Detective Conan, often said. There are many sayings: there is always only one truth! Note: most of the mandarin versions are translated as: there is always only one truth! The introduction and the last sentence at the beginning of each theatrical version are all, but the frequency of TV version is not too high.

Outline of the story of Detective Conan;

Kudou Shinichi is a famous high school detective in China. Unfortunately, he was found by gang members when he was chasing a black criminal gang. After being knocked unconscious, he got a magical potion, and Kudou Shinichi became a child again! Xinyi found Agasa Hiroshi who often helped him, and the doctor tailored many spy weapons for him.

In order to prevent criminal gangs from retaliating against him, Xinyi decided to remain anonymous and pursue it secretly, hoping to get an antidote. One day, Mao Lilan, Xinyi's girlfriend, came to Agasa Hiroshi's home to look for her boyfriend's whereabouts. Shinichi, who was caught by Xiaolan, made up his own name, Edogawa Conan, and Conan lived in Xiaolan's house.

Refer to the above? Baidu Encyclopedia-Conan