Holy Week explained

Holy Week 

Holy week is the most important season on the Orthodox Christian calendar. It celebrates the completion of God's redemptive work of creation by the destruction of the power of death by Christ's triumph over it through his death and resurrection.

https://www.oca.org/orthodoxy/the-orthodox-faith/worship/the-church-year/holy-week

A marvellous explanation of the Orthodox understanding of atonement can be seen in this short video. 

https://www.youtube.com/watch?v=55Z7S7wn77k&list=PLxcntdlvObPgDGgBg1mYsUxnfGcyTBKcc&index=21&t=109s