Wheelchair-bound, after an accident in which her husband was at the wheel, Anne Clewiston Symons is kept from pursuing the laboratory project (pa--a painkilling factor) she had initiated, her husband Clark working alongside her. In another cage there are chimps which are just now beginning to show signs of hostility proceeding to psychosis which suggest something is very wrong. But without telling Anne and against her better judgment or rather intuition, the company decides to go ahead with human experimentation while at home she is showing signs of withdrawal and hatred of Clark. He now questions whether or not she took some of the pa--she can't quite remember whether she did or didn't--and at the end, sure of her obligations, she has herself committed to an immediate and more distant future alone. An uncompromising ending for both science and fiction by a woman primarily known for her works in the portmanteau category--but until you reach it, author Wilhelm has vamped a good many ideas in the private and public domain. A susceptible, you might say unavoidable, entertainment with a no-exit hasp.