When you die, your consciousness ceases to exist (as the neural pathways in your brain are no longer firing, and their group activities are what form who you are), and your body remains wherever it is, and decays, or is incinerated, recycled, etc.
Humans are simply complex reactions that abide the laws of physics like anything else - be it atoms, microbes, other animals, planetary ecosystems, solar systems, galaxies, or the universe itself. Even free will, the greatest argument for us being something more, itself is an illusion; you will always accept the position most favorable to you, even if you think you are acting in a way that is poorly suited to your interests.