As Captain America battles Zaran and Machete beneath the waters off Bermuda for the latest fragment of the Bloodstone, Batroc has led a shiver of sharks back toward them. (Yes, "shiver." Look it up.) Cap has to force Zaran’s head around to make him aware of the new danger and the villains escape to the sunken airliner, leaving Cap to face the predators alone. Cap slices one with his shield, the bleeding distracting the other sharks away from Cap while he enters the rear door of the sunken plane and heads for the cockpit where the villains have sought refuge. They refuse to admit him so Cap is forced to swim into the open again to find a hiding place of his own….
Meanwhile on the surface, Diamondback has finally located Baron Zemo’s yacht with the aid of wealthy vacationer Durer. She thanks him with a kiss (leading to his jealous girlfriend’s punching him in the eye) and dives overboard. She boards the enemy craft and overpowers Zemo, but his psychic henchman Tristram Macawber gets the drop on her….
Below, Cap’s shield has become wedged into a shark’s mouth and the hero must fight off the other predators with his fist and feet. Inside the plane, Batroc grabs a machete from his henchman and swims outside. He attacks the shark which has Cap’s shield in its grip, freeing the hero to face the others….
Aboard the yacht, Macawber holds Diamond at gunpoint—but she is using the unconscious Zemo as a shield. A distraction comes in the form of Durer (sporting a black eye) returning with Diamond’s scuba gear—so Macawber threatens to kill Durer and his girlfriend if the anti-heroine does not surrender. Instead, Diamondback skewers him with one of her throwing diamonds. Thus when Batroc and his cohorts return to the ship, they receive a surprise: Diamondback has the case containing the first two Bloodstone fragments, and Zemo as a hostage. She demands that Batroc toss her the fragment just recovered; he does—but he throws it wide so that she is distracted enough for Zaran to hurl a sai into her shoulder. Zemo then seizes the case and throws her overboard—but the villains then discover that she had removed the two fragments from the case, leaving them with only the one found under the sea. Meanwhile, Cap has rescued the wounded Diamond and signaled John Jameson to pick them up—as a mysterious figure with a skull mask and crossbones on his chest watches from a nearby boat. Aboard the plane, Cap tends to Diamond’s wounds while she boasts of her exploits in swiping the two fragments of the Bloodstone (but Cap declines to kiss her as a reward).
The detector sends them to Egypt, where Cap and Diamond discover an entrance to an underground crypt near the Pyramids. As they explore the ancient tomb, suddenly the floor drops out from beneath them, dropping them into a pit of poisonous snakes….