intrigue
     n 1: a crafty and involved plot to achieve your (usually
          sinister) ends [syn: {machination}]
     2: a clandestine love affair
     v 1: cause to be interested or curious [syn: {fascinate}]
     2: form intrigues (for) in an underhand manner [syn: {scheme},
        {connive}]
Source: WordNet® 2.0