Enterprise wants to go through a short-cut-portal to reach Degra

But then a different Enterprise shows up and says they probably shouldn’t do that

They say they’re the descendants of the crew

The portal was destabilized because of a fight and it makes them go over 100 years into the past. They want Enterprise to modify stuff so it can go faster, and meet up with Degra in time without using the portal

Phlox verifies that they’re are the descendents of the crew. He says their captain is the son of T’Pol and Trip

An old T’Pol is on board. She warns Archer that the modifications might be dangerous

Archer tells the captain of the other Enterprise that he doesn’t want to do his dumb modifications

Their captain decides he has to steal the parts that his ship needs in order to make the trip to Degra, and they can do the mission

As the 2nd Enterprise tries to get away a fight breaks out and T’Pol starts beaming over parts of their ship

Their captain feels guilty because he missed the opportunity to destroy the probe that killed 7 million people on Earth

T’Pol visits the old T’Pol and the old T’Pol tells her to follow her heart

The 2nd Enterprise helps get them through the portal safely

The 2nd Enterprise holds off the enemy ships but were supposed to follow them through. They never made it. Either they were destroyed or Enterprise not going back in time erased them. How come they didn’t consider that that might happen before?

They meet up with Degra again