After successfully breaking the curse and returning the treasure, Sarah felt a sense of relief and accomplishment. However, she couldn't shake off the feeling that something was still off. She couldn't help but wonder about the diamond that was missing from the treasure. It was mentioned in the diary, but they couldn't find it anywhere in the mansion.

Sarah decided to investigate further and discovered that the diamond was cursed with a different curse than the rest of the treasure. It was said to bring immense wealth but at a great cost. Sarah became obsessed with finding the diamond and breaking its curse, but she couldn't do it alone.

She reached out to Ben, who had become a close friend during their treasure hunt, and together they embarked on a new adventure. They traveled to different countries and met with experts in the field of curses and diamonds. They discovered that the diamond was last seen in the possession of a wealthy businessman who had recently passed away.

Sarah and Ben infiltrated the businessman's estate and found the diamond, but they were caught by his son, who was determined to keep the diamond and its curse for himself. A fight broke out, and Sarah and Ben barely escaped with their lives.

Despite the danger, Sarah couldn't let go of the diamond and its curse. She believed that she could break it and use the wealth for good. She and Ben continued their search, but they were constantly being followed and watched by unknown forces.

As they got closer to breaking the curse, Sarah and Ben realized that they were not the only ones after the diamond. A mysterious organization, known only as The Syndicate, had been tracking them and was determined to get their hands on the diamond.

Sarah and Ben must use all their skills and resources to stay ahead of The Syndicate and break the curse of the lost diamond. But as they get closer to their goal, they realize that the curse might be more powerful than they ever imagined, and the cost of breaking it might be too high.