The runaways

Grandpa hates being in hospital. He thinks only of the place he was happiest---the island where he used to live. He wants to go back, but they won't let him out of the hospital. So Gottfried Junior, his namesake, helps Grandpa make a plan to run away. They think of everything. Their deception is so complete that when Gottfried Junior finally decides to tell the truth, no one believes him.