Luke's Gospel (good news) is a record, in order, of the main events in Jesus' life. Its author was Luke, who was a doctor. Luke was a friend of Paul.
Luke probably did not belong to the Jewish people. His book shows that Jesus cared about everyone. Jesus cured many ill people. Jesus cared about women (for example, Luke 7:11-17). Jesus allowed children to come to him (Luke 18:15-17). And Jesus cared about poor people (Luke 21:1-4).
Jesus taught many lessons to the people. Often, he told parables (stories with a meaning) to teach the people about God. Jesus wanted everybody to confess their evil deeds and to trust in God.
Some evil leaders opposed Jesus. They plotted that Jesus would die. Jesus knew about their plans (Luke 18:31-34). But Jesus also knew that God wanted him to die (Luke 22:20-22, Luke 22:42). And, after Jesus' death, God would cause Jesus to live again.
Luke describes these events. The Bible taught that these things would happen (Luke 24:25-27, Luke 24:44-49).
Luke explained these events further in his other book, called Acts (Acts chapters 2-3). When Jesus died, he suffered the punishment for our evil deeds. So, we must confess our evil deeds to God. And we must invite God into our lives.