Ishtar wants to see the queen of the underworld, Ereshkigal. It basically plays out like Inanna's descent into the Underworld, only without the whole bit about the shepherd.
And no death judges. Instead, Ishtar goes to punch Ereshkigal's lights out for stripping her down, and Ereshkigal locks her up and gives her sixty diseases. It's also Shamash who petitions for her release, rather than some dinky minister. He's a good lad here, but a fucktard in the other one.