Give me a walkthrough of chapter one in the Diablo 3 please.
Sure, I'd be happy to provide a walkthrough of Chapter One in Diablo 3!

Chapter One in Diablo 3 is called The Fallen Star and takes place in the town of New Tristram. Here's a step-by-step walkthrough:

1. The game starts with a cinematic showing a fallen star crashing into the town's cathedral. Your character is then seen traveling to the town to investigate.

2. Once you arrive in New Tristram, you'll meet a woman named Leah who will guide you through the town and introduce you to other characters.

3. You'll explore the town and complete some quests, including finding Deckard Cain who is trapped under the rubble of the cathedral.

4. Once Deckard Cain is rescued, he will tell you that the fallen star is actually a person - the Archangel Tyrael - who has fallen to Sanctuary (the game world) to warn of a great evil.

5. Your character must then travel to the old ruins of Tristram to investigate the fallen star and uncover the evil that Tyrael warned about.

6. In the ruins, you'll encounter various enemies, including skeletons and zombies.

7. You'll eventually find a mysterious stranger who tells you that the evil you're seeking is none other than Diablo himself.

8. After defeating a large group of demons, you'll discover the crater where Tyrael fell and encounter your first boss, the Skeleton King.

9. After defeating the Skeleton King, you'll return to New Tristram and meet with Tyrael, who tells you that you must find and defeat the other two Lords of Hell - Belial and Azmodan - to prevent Diablo's return.

And that's the end of Chapter One in Diablo 3! From there, you'll continue on to the next chapter and face even greater challenges as you attempt to save the world of Sanctuary from the forces of evil.
What are some of the main objectives in Chapter Two of Diablo 3?