Ably assisted by a monkey sidekick and a labradoodle professor, Aqua Boy is an intrepid underwater adventurer – scouring the uncharted depths for mysterious, long-forgotten artifacts. Unfortunately, his latest mission has gone drastically wrong! Take control of Aqua Boy as he emerges from the wreckage of his submarine, embarking on an epic adventure through the ruins of a sunken city. Meet a host of eccentric characters, from fussy bureaucrats to mercenary bees; upgrade your weapons and defences, acquiring new abilities that open up previously inaccessible areas; do battle with all kinds of strange creatures, including five bosses.