John On-Wan (JUTI JUMROENKETPRATIPE), a young taxi driver with a collage degree fell in love with Nan-Na-Phat (ABSORNSIRI INDRACUSIN), the niece of Sia Mang-Gorn (TRAGARN PHANTUMLERTRUJEE) who is a multi-millionaire. Things begin to go a bit haywire when John On-Wan unexpectedly becomes the father to Nong Wun (APIRAK TANGSATHAPORNPHAN), Sia Mang-Gorn’s only heir. Nong Wun is being hunted down by Sia Mang-Gorn’s first wife, Garn-Da (GANYAGORN PINIT). Furthermore, John On-Wan has been accused of being an experienced gunman which caused him to have to run away with Nong Wun to an elephant camp. But things become even more chaotic when Nan-Na-Phat was sent to take care of the elephant camp, a family business. John did his best to avoid her but there were often situations where he must help save Sia Mang-Gorn and Nan-Na-Phat from harm. John On-Wan was soon promoted to Nan-Na-Phat’s bodyguard. All the love John once had for her is rekindled which causes him to reveal the truth. He is finally able to prove his innocence and successfully uncover evidence to expose the villain. Nong Wun returns home while John On-Wan gets to take care of Nan-Na-Phat’s body and soul without having to be branded as “The Gunman with a Baby”.