Jane Foster (Natalie Portman) is a lonely scientist. Her last boyfriend was a creep, she dumped him, and now all she has is her scientific work. Foster roams the desert looking for the Einstein-Rosen Bridge (a wormhole that connects this universe with another one). She believes that our universe is not alone but is connected, by wormholes, to other universes. She is in that camp of scientists who propose that we live in a multiverse. Think of a kitchen sink. Think of water in that kitchen sink. Think of dishwashing soap in that sink. See all of those bubbles? That is something like the multiverse.
Suddenly, the sky over the desert opens and a blond hunk falls down to the earth. Now, isn’t this fitting: Jane Foster needs a man and she also happens to be a scientist looking for the Einstein-Rosen Bridge. She gets two for one: proof that wormholes exist (a scientific breakthrough) and a man (Nordic, muscular, medieval). But as the film progresses, as the man, Thor, destroys this and fights that, you begin to have second thoughts about Foster. Maybe all of that time she spent in the desert—looking at the skies, collecting data, checking data, writing research grants—had nothing to do with science and everything to do with finding a man. Some women go to a bar, or to a party, or online when they need a man. Foster goes to the desert with a research team and expensive equipment.
Lucky for her, there is another universe, and this other universe does have a man. And one day, this manly man falls from the sky and practically lands on her. He looks human enough, he talks enough English, and he has more than enough muscles. But before Foster can fuck him (SPOILER ALERT!), he goes back to his universe. This terrible movie happens to have a sad ending.