Set 20 years after the events of the original, Waterworld 2 sees the Mariner (Kevin Costner) returning to the open seas. The story begins with Helen (Jeanne Tripplehorn) and Enola (Tina Majorino), now a skilled navigator and explorer, thriving on Dryland. However, their peace is shattered when Enola discovers a map hidden in ancient relics, pointing to another possible Dryland beyond the horizon.

Driven by a desire to expand their haven and ensure survival, Helen and Enola seek the Mariner’s help to embark on a perilous journey. Reluctant at first, the Mariner joins them, motivated by his deep connection to Enola and curiosity about the evolving world. Along the way, they encounter new dangers, including vicious sea storms, mutated sea creatures, and a revived faction of Smokers, led by a cunning and ruthless leader (played by Javier Bardem).

As they traverse uncharted waters, the Mariner grapples with his past, his identity as an outsider, and his growing fatherly bond with Enola. The climax reveals a shocking twist: the supposed Dryland is not untouched paradise but a ruined, toxic wasteland caused by humanity’s hubris.

The film ends on a bittersweet note, with the trio returning home wiser and more determined to protect their own Dryland, offering hope for a fragile future.