"Tropic of cancer" tells the story of Li Ming (Aarif Lee decoration), Mimi (Wu Xinshi) 4 urban youth consisting of a glossy appearance beautiful, but special design bureau liar feelings gangs using various high IQ deception fraud, often successful. Are four complacent when, did not think of it, a scam new not only did not succeed, anti will find in a countdown in the explosion, Li Ming in order to in the limited time rescued Mimi, must find a "beak" Phoenix butterfly. And find the key beaked butterfly is a named A Long (Huang Lingshi) Yunnan original ecological man, who holds the secret of a butterfly. The gang had to once again with Li Ming as bait, to Aaron's hometown of Yunnan Honghe Prefecture, old tricks again, love cheat cheat. Explosion date draws near, the alien wedding preparatory soon, butterfly legend confusing, exactly is smart guy bunco success, or Asif family man married to pressure village husband, the drama is about to begin.