There is no equal to Amar Singh in writing a new chapter on friendship. But what went so wrong that such old die-hard friendship turned sour. Mulayam and Amar are no longer friends. And Amar’s saying in his trademark threatening style that several secrets of Mulayam would remain buried in his heart till his death also means a lot. But what are these secrets — information on some savings accounts or a colourful CD of Netaji with a known actress who moves around in the political circles?