Daniel, the driver of a very special taxi in Marseille, gets a famous soccer player to the stadium in time and later helps his clumsy police friend Émilien catch the dangerous Belgian after he escaped on Émilien's guard.

The Japanese ambassaor is visiting Marseilles to view the city police's anti-gang tactics. During the visit, however, he is kidnapped by a group working for the Japanese yakuza. Young officer Emilien is determined to rescue the ambassador and officer Petra (his girlfriend), who was also kidnapped, and restore the honor of his department. Once again, speed demon taxi-driver Daniel (from the first Taxi movie) is called upon to save the day with his high-speed driving skills.

Hubert is a French policeman with very sharp methods. After being forced to take 2 months off by his boss, who doesn't share his view on working methods, he goes back to Japan, where he used to work 19 years ago, to settle the probate of his girlfriend who left him shortly after marriage without a trace. There he mets his former colleague Momo and his daughter Yumi who he did not know was ever born. Hubert eventually finds out why his girlfriend left him and the reason becomes his and his new daughters problem.

A gang of thieves calling themselves the Santa Claus Gang are wreaking havoc, and the police can't keep up. Police Captain Gilbert is distracted by a Chinese reporter writing a story on his squad, detective Emilien's wife has just announced that she's pregnant, and taxi driver Daniel is in the midst of a relationship crisis. After a string of mistakes in which the thieves outsmart the police time and time again with a reporter there to record it all, Daniel and his super-taxi pitch in.