AN UNWELCOME INTRUSION is the story of Lucy Grumbach's life. She struggles to win her father Herman's love and approval. She worries about her abused mother, Gertrude. Her solace is found during the summers she spends on her grandparent's farm. There she meets a young neighbor. Jim Hunter eventually rescues her from her father. The Vietnam conflict takes Jim away. Jim's father, Zachary, assumes the role of protector to Lucy and her mother. He is so successful that Lucy convinces herself she need never see her father again. But, when Herman reaches death's doorstep, Gertrude pleads with her daughter to save her father's life by donating one of her kidneys to him. Lucy's emotions are once again thrown into turmoil.