A minituarized Martin has been following Hero the Salmon on her Salmon run. They both swim into Aviva, who is standing in the river. Aviva and Martin follow Hero on part of her journey, when they get to one of Hero's obstacles, a waterfall.
While in their submarine, the brothers end up in a Salmon run as they try to find the fish carrying the time thruster. As they travel with the Salmon, Salmon Shark who prey on the Salmon arrive, thinking the sub is a Salmon the Shark crushes the sub.
A miniaturized Chris along with Brine Shrimp from the marsh, get sucked-up into a storage jar by Gourmand. Gourmand starts loading his plane to take his Brine Shrimp water for delivery. Flamingo Martin and a flock of Flamingo's try to stop him.