Cleveland is furious when Donna's ex-husband, Robert, crashes Freight Train's birthday party and upstages Cleveland's gift for his dad. To make matters worse, Freight Train officially adopts Robert, and Cleveland must learn to get along with his new "brother." Meanwhile, to pay off a bet they owe to Donna, Rallo and Junior become "dog bounty hunters," tracking down lost pooches, returning them to their owners and collecting the rewards.