Kind of. So imagine you're coming home from work. Normally you take route A, but today you choose to take route B.
You get in an accident and die.
But there was a universe where you choose route A, and lived. That would be this universe.
So major events and decisions will cause new timelines to branch off, and this is happening infinitely. There are worlds where we lost World War 2, others where World War 2 never happened. Worlds where we kept going to the moon and now have colonies. TImelines where Earth doesn't even exist and we're all aliens. And so on.
In one universe, some people develop mutations that grant them, basically, superpowers. Sometimes, people in that universe will accidentally explore other alternate timelines.
So imagine what happens if that universe starts bleeding over. You start dreaming of that other version of yourself, and the dreams are more real than real life.
And then one day you wake up and you have those super powers.