Josiah became the king of Judah when he was 8 after his father King Amon was killed.
When Josiah became King, he knew the people were sinning and worshipping false gods.
He wanted to do the right thing and keep God's law in his kingdom, so he got rid of all the places to worship idols, and made a temple to worship God.
One day a priest found a book containing God's laws at The Temple. When the priest read the laws to Josiah, he realized how much he and the Israelites disobeyed God, so Josiah ripped his shirt and cried.
Please GOD forgive us for disobeying you!
The priest went to a prophet to see if God could forgive Josiah, the prophet said that the Israelites deserved to be punished, but because Josiah was sorry and wanted to repent, God forgave Josiah.
Josiah gathered all the people to tell them the laws of God, and then everyone wanted to obey God.