A mutated manta ray interrupts the wedding of Elsie's spoiled sister. Elsie sees this as an opportunity to prove herself to her estranged parents who are attending her sister's wedding and think Elsie is a no-good klutz.
A girl named Meg asks H.E.A.T. to find her two brothers who went missing in a silver mine. They find Silver Hydra there, a mutated monster that turns anyone it touches into silver statue and can regenerate itself in seconds.
Armillaria, a giant fungus that sucks amino acids out of living matter, shows up in Michigan. Also, the city of Miami sues H.E.A.T. for damages when their latest battle with a giant mutated vampire bat leaves the city in ruins.