No photos from that day- was too tired.
The plumber arrived on Tuesday and used the auger on the drain. He said the tree roots were causing the flooding in the basement- and found a PLASTIC BAG! How the HELL would a plastic bag get in there?!
My drain problem is probably good for another year or two.
The guys spent part of the day cleaning up the aftermath and got a full garbage cans full of crap in dumpster from the basement.