Two private detectives, Stan and Ollie (Stan Laurel and Oliver Hardy), from Illinois fly to Mexico City in search of a mysterious woman. At the same time, thousands of bullfighting enthusiasts are awaiting the arrival of Don Sebastian, a famous matador from Spain, whos been delayed due to passport issues. When Hotshot Coleman, a press agent, realizes that Stan could be Sebastian's twin, he tries to convince Stan to assume the matador's identity. But when Stan refuses, Coleman threatens to tell Richard K. Muldoon the detectives' whereabouts. Apparently, Stan and Ollie were responsible for Muldoon's wrongful imprisonment, and Muldoon swore revenge. Under the circumstances, Stan and Ollie have no choice but to go along with the plan.