Set on a US bomber over Europe in WW2, the crew of the Liberty Belle is sent on a mission to bomb a church in the dead of night. Though they successfully level their target, their mission isn’t over as they are attacked by an unholy demon that was summoned by a blood ritual just before. A bloodbath ensues as the demon slaughters one crew member after another, until the final two are barely able to defeat it with the critical help of a deceased crew member's holy cross.

In the far-flung future, humanity has established new societies across the solar system, including one that has revived the mighty dinosaurs and holds deadly races with gladiators trained and bred for riding them. But the finale of this particular race is not what the spectators intended, when the race winner forms a kinship with the tyrannosaur and unleashes bloody chaos.

Aliens have arrived and they seek an audience with the dolphin named Blackfin, as well as a local priest who apparently witnessed the miracle of the dolphin’s resurrection. Though the alien emissary and Father Maguire are able to share basic pleasantries, it soon becomes apparent that the aliens are on a holy crusade for the God of Those Who Swim and humanity begins to pay the price for their lack of goodwill towards ocean dwellers.