In Samson v. Riesing, 62 Wis. 2d 698, 710, 215 N.W.2d 662 (1974), the Court recognized that "vicarious liability ... and joint venture are essentially doctrines that are applicable to a situation where the negligence of one party is proved and it is sought to hold another party liable." The court further recognized that these doctrines are of no assistance to a plaintiff "where the onus of negligent conduct has not been placed on any defendant." Id.