Ryan Philip is a smart cute school boy who has problems understanding maths. As he struggles to escape from doing his maths homework, he resorts to mischievous acts, including stabbing his classmate named Decimal, using a
pencil, in an ego clash. He is not realizing the trouble he is making. He has a good relationship with his dad Roy Philip and mother Sameera and Ryan's grandfather Richard Philip, who is an antique collector. On visiting his grandfather's house, Ryan gets a magical pen called monkey pen. This monkey pen does his maths homework and soon changes his whole life. After many circumstances and the death of Ryan's girlfriend Joan in a school bus accident, Ryan's life changes in a surprising way. The hatred relationship between his maths teacher Pappan and him changes when he does the homework regularly and he and his friends try hard for a maths exhibition and fail. Pappan gets a transfer because of Ryan's doing earlier to trap him. But he regrets later and confess to the teacher at the farewell. At last, Ryan understands that the one who had been doing his maths homework was not the monkey pen but his father. In the credits scene, it is shown Ryan studying the multiplication table. ==Cast==