This song is about being a prisoner. Being stuck in something and unable to get out. Unable to escape.
Being caught in a cycle of sin and addiction can feel like being a prisoner. Psalm 32:5 (https://bit.ly/3apZxl0) talks about confessing our sin and receiving forgiveness. Romans 6:18 (https://bit.ly/2Mj1gkd) says Jesus has set us free from our sin.
When you feel trapped in sin, there are two good things to do. Firstly, pray! Remember who God is. Secondly, find a mature Christian you trust and tell them. Ask them to help you on your journey to freedom from that sin.