Iravum Pagalum (1965)

This taut, suspense thriller follows the life of Rajasekar (Jaishankar), a wealthy and carefree college student, leading a luxurious life with his widowed mother (Pandari Bai). One night the family is robbed of all its wealth by a gang and his mother prevents him from reporting it to the police. Realising that there is some mystery behind it, he sets out to unravel it. Cleverly disguised, he infiltrates into the gang of smugglers and robbers. Will he succeed in unravelling the mystery without putting his own life in grave danger?