Epsilon team leader Edmund Seng is killed in a raid. Glenn Chua arrives, cold and distant, creating tension. Burmese immigrants are found in Woodlands; one dies. The driver is suspected of being just a pawn in a larger network.

Jackson witnesses a student being stabbed with an illegal knife at a bus stop. With little evidence and rumors, the team decides to have rookie Dynesh infiltrate the gang to gain key information.

Two men find illegal snakes linked to the "Angel" syndicate and businessman Patrick Lau. Glenn and Vivian, undercover as a couple interested in exotic pets, attend a party for Lau, but their plan goes awry.

The Coast Guard intercepts a boat carrying illegal immigrants, but the occupants are bailed out. One dies and Chow, the middleman, disappears. The team suspects the "Angel" syndicate and must find Chow before they find him.

Norah's aunt has found a new boyfriend Victor, a charming and polite businessman. Cheong and Norah grow suspicious when a bag of pills is found in Victor's bag.

The team investigates marriage scams using the name of a mentally disabled man to fake marriages and grant visas to young foreign girls in Singapore. Cheong and Dynesh face major challenges in tracking them down.