YAU gives statements at the police station, during which he points out that JAY had gone missing while canoeing alone as verified by three of his friends. TUNG studies the purchase receipts found near the skeleton, and discovers that JAY did visit Lamma Island before his death. YEE and FUNG go to question JAY’s friends ALEX, BOWIE and MICHELLE at a gym. ALEX reveals that JAY had a quarrel with a boatman on Lamma Island, who he believes may have something to do with JAY’s death. HING comes to respect REBECCA more and more when he knows that she is a fervent supporter of environmental conservation and manages to achieve such a successful balance between work and family. Having learnt from YEE that ALEX has a residence on Lamma Island, YAU means to test him out at the gym. YAU tells ALEX and BOWIE that he has got something which is left by JAY...