At the end of "The Fast and The Furious", Officer Brian lets Dom go. Afterwards, Dom flees to the Dominican Republic where he meets Han (a key character in "The Fast and The Furious: Tokyo Drift"). Meanwhile, Officer Brian is imprisoned for letting a key criminal escape but is later released after completing a secret mission given by the government. Dom's girlfriend Letty maintains Dom's business by transporting drugs for Barga, a drug lord in the southern US. However, Barga kills Letty to destroy the evidence. Mia (Dom's sister) informs Dom via phone. Dom returns to the US to attend Letty's funeral, where he meets Officer Brian. Brian is about to pursue Barga, and Dom joins without hesitation. Thus, the new plot begins.
One-sentence comment: Audiences crave films that smash those precious sports cars into smithereens.