Aliens from the Fifth Space-Time

A team of nuclear scientists on planet Globe in a parallel universe are approached by harmless aliens, who on the surface look like humans. These aliens are desperate to fix one of the components in their battery system otherwise they will disintegrate and not be able to return to the Fifth Space-Time Dimension, from which they came. In return for the facilitation of equipment necessary to remedy the unique problem, the scientists are offered- amongst other things- a ride in the aliens Fifth Field Vehicle. Inside this wondrous contrivance, the passengers become invisible to others , yet they themselves can see and hear everything around them. Will the alien problem be solved in time, or will the aliens revert to more primitive existences?