Mary Jane is being stalked by her former boyfriend, Morris Bench, who's undergone an accidental metamorphosis and become Hydro-Man. Sweeping Mary Jane off her feet in a wave of water he insists she will love him. Spider-Man is nearly beaten by the semi-liquid culprit but with a little help from Mary Jane puts a stop to this villain by causing him to evaporate once drawn away from the water that feeds him.

Mary Jane and Peter arrive in Niagara Falls for their postponed honeymoon, but it is soon interrupted when Hydro-Man returns and kidnaps MJ!

Peter is shocked by MJ's new powers so they seek Curt Conners' help in figuring everything out. MJ tells them about a dream she's been having, which may be a clue to her disappearance. But Hydro-Man finds them and kidnaps MJ again. Will Spidey be able to find her by following the clues from her dream?