Deal Breaker is a side mission in Watch Dogs: Legion.
Your task is to locate Abby Tran, the person who brokered the deal between Clan Kelley and another group.
Here’s a walkthrough of Deal Breaker in Watch Dogs Legion.
Reach the target
Head to Rotherhithe Docks at Southwark to find Abby Tran. The location is provided in the map.
You can enter the area through the front gate.
Neutralize Abby Tran
Enter the building and you should easily spot Abby Tran. Scan the area and she’s marked in yellow.
Kill her and leave the area.
The mission ends after leaving the area safely.