The story revolves around Ravi, his mother Vidya, and his elderly grandfather (Grandpa). Grandpa has recently moved from his quiet town house to live with them in a crowded city flat because of his failing health and a recent fall. Vidya is highly anxious and overprotective, treating Grandpa like a baby and forbidding him from going out alone. Ravi is left in charge of Grandpa during his holidays.
Grandpa, a proud former lawyer, resents this loss of independence. He tricks Ravi into letting him go out alone to get a newspaper. Feeling guilty and worried, Ravi secretly follows Grandpa at a safe distance. Ravi witnesses Grandpa enjoying forbidden pleasures: drinking sugary tea, eating bananas, and having ice cream. Grandpa then enters a barber shop. To Ravi's shock, a man wearing Grandpa's signature yellow cap boards a bus, but upon confronting him, Ravi discovers it is a stranger whom Grandpa generously gave his cap to. Ravi loses track of Grandpa and becomes frantic with worry.
Upon returning home, Ravi is relieved to find Grandpa safely asleep. Later, Grandpa playfully teases Vidya about her own memory, suggesting she needs Vitamin-M (a fictional memory vitamin). He then presents Ravi with a birthday gift: a book titled The Best Detective Stories, with a mischievous tip on how to avoid getting fooled when trailing a suspect, revealing that he was aware of Ravi's pursuit all along.
This deeply emotional poem explores a child's faint, sensory memories of his deceased mother. Rather than concrete visual images, the poet remembers his mother through sensory associations.