1. Jehosheba hides Joash (1-3)

Baal worship was destroyed in Israel. But it was alive and well in Judah, due to Athaliah, a Baal worshiper. She killed her grandsons in order to be the sole queen ruler in Judah. But Jehosheba hid her nephew Joash son of Ahaziah. So David's line was not extinguished.

2. A king established; a queen and her Baal worship eradicated (4-21)

Jehoiada and Jehosheba waited six years, then announced Joash as king. Jehoiada had guards and all the people well-prepared to install Joash as king. Athaliah said, "Treason!" but it didn't work. She was seized and executed. Jehoiada made a holy covenant between the LORD and the king and people that they would be the LORD's people. The people demolished Baal worship in Judah and all the people rejoiced. When evil is demolished and people enter freely into a covenant with the LORD, there is cause for great rejoicing.