There is a lot of action in this play, including a backscreen and staggered screen which culminate in a pick-and-roll scoring option.
With O1 at the top right, the weakside high post flashes top to receive the pass from O1. O5 steps up and sets a backscreen for O1. If open, O4 can hit O1 with the pass.
If O1 was not open on that initial cut, O4 will swing the basketball back to O5. O2 will then cut to the top off of a staggered screen set by O1 and O4.
O5 reverses the basketball back to O2.
After passing to O2, O5 sets a pick-and-roll. O2 uses the pick-and-roll to create a scoring opportunity via the dribble, jumper, pass to O5, kickout to a player on the perimeter.