La Chèvre (1981)

La Chèvre features Depardieu as the tough-guy private detective Campana, hired to find Marie, the daughter of a rich businessman, who has mysteriously disappeared while vacationing in Mexico. The case turns out to be complicated - several attempts to find her have already failed. A psychologist, Meyer, who works for the businessman, suggests a plan. Marie is known to be extremely unlucky and accident-prone; the psychologist advises sending someone equally accident-prone to find her, on the theory that what happened to her may also happen to him, and thus, following her steps while the detective tags along, the daughter can be found and returned home. Richard's character Perrin is an awkward, accident-prone accountant who works for the businessman, and is chosen to implement the scheme. The adventures of an odd duo begin...