Following a sighting of a migrating tuna school, the Octonauts discover one of the swift fish, named Tina, has been separated from her group. And she’s hurt! The poor creature has a hook lodged in her mouth and is too weak to swim. After Peso provides first aid, the Octonauts resolve to assist her in reaching the tuna spawning grounds. But they must hurry; the breeding season is fleeting. Fortunately, Tweak’s newest gup, the Gup-R, is her fastest creation yet! They employ it to tow Tina, but when the Gup-R’s battery fails, how will they rejoin the rest of her school?
