The Deepest Goldfish begins after a cruise liner sinks to the bottom of the Pacific Ocean, and three individuals find themselves marooned on an island in the middle of the sea. Forced together through these unfortunate circumstances, the islanders find themselves with nothing but their own thoughts and a lot of time for conversing and so their opposing views on life slowly begin to tangle together. Grounded together, Anto (Megan Roberts), Benjamin (Conor Dwyer) and Teddy (Darragh Murphy), each transport their own worlds to the island. As their worlds collide, epiphanies ensue.