Plummer and Lord were called into the New Zealand squad as injury cover for the two tests against Argentina on home soil after lock Tuipulotu and fullback Perofeta both sustained calf injuries.
Lord ended up playing off the bench in both matches against the Pumas, a loss in Wellington and a win in Auckland, because of a finger injury to skipper Scott Barrett.
Hopes are high that Barrett will be fit to face the world champion Springboks in the tests in Johannesburg on August 31 and Cape Town the following week, which are likely to decide who wins the southern hemisphere championship.
Loose forward Luke Jacobson and loosehead prop Ethan de Groot will both travel despite struggling with hamstring and neck injuries respectively.
Plummer, who can cover first five and fullback, is one of two uncapped players in the squad along with outside back Ruben Love.
Squad:
Forwards: Asafo Aumua, Codie Taylor, George Bell, Ethan De Groot, Tyrel Lomax, Fletcher Newell, Pasilio Tosi, Ofa Tu'ungafasi, Tamaiti Williams, Scott Barrett, Tupou Vaa'i, Josh Lord, Sam Darry, Ethan Blackadder, Sam Cane, Samipeni Finau, Luke Jacobson, Dalton Papali'i, Ardie Savea, Wallace Sititi.
Backs: Noah Hotham, TJ Perenara, Cortez Ratima, Beauden Barrett, Damian McKenzie, Jordie Barrett, David Havili, Rieko loane, Anton Lienert-Brown, Billy Proctor, Caleb Clarke, Will Jordan, Ruben Love, Sevu Reece, Mark Tele'a, Harry Plummer.
