A dead body washes up on the ocean. Steve's investigation leads to a farm with migrant workers. The migrant workers are dying from an unknown ailment and Mark struggles to find the cause.

Dr. Mark Sloan (Dick Van Dyke) reprises his role as the crime solving doctor in this tv movie based on the television series. When a large group of Mexican workers are infected with a deadly virus, Dr. Sloan and his friends must figure out the cause and cure for it before it's too late.—thexotherxchris