What Became of Jack and Jill?

Johnnie Tallent is a callous young mod who lives with his elderly, invalid grandmother, Alice. The two concoct a plan to induce a heart attack in Alice by gaslighting her. Johnnie slowly begins convincing Alice that London's twenty-somethings, feeling that the elderly have become a drain on society, are planning a youth revolution, with the goal of either killing the elderly or placing them in internment camps. After several weeks, Alice grows paranoid and reclusive and her health seriously deteriorates.