Step 1

Red is on defense

Step 2

Red pulls to blue, who sets up in a side stack

Step 3

Notice that 4 and 5 protect the unders, while 6 and 7 look to help deep

Step 4

As 7 (on blue) pushes into the open side as the iso, the open side under defender (5) picks them up. 7 (on red) needs to look to help deep still

Step 5

Now that the first look doesn't happen, defenders can start to pick up on person D.

Step 6