With three days left until the apocalypse, the safe house had temporarily returned to calm after that harrowing battle, but a tense atmosphere still lingered in the air. Ignoring her exhaustion, Su Yao was completely absorbed in studying the newly upgraded space.

She focused her attention on communicating with the space again and was pleasantly surprised to discover a brand-new, amazing function after the upgrade—it could bring people in. This discovery both surprised and delighted Su Yao, as she knew this function would be a huge life-saving tool in the apocalypse. Su Yao couldn't wait to tell her family the good news, and a glimmer of hope flashed in her parents' eyes.

However, before they could properly study this new function, the space suddenly trembled slightly. Then, a soft light emanated from its depths, within which mysterious runes faintly appeared, slowly emerging at the boundary of the space. Su Yao tried to approach these runes, and when her hand touched one of them, a flood of information instantly rushed into her mind. It turned out that these runes were a detailed explanation of the space's ability to transport people, as well as some limitations.

According to the information conveyed by the runes, the space can only accommodate a limited number of people at a time, and those brought in must maintain absolute calm and trust; otherwise, it may cause harm to the space and the person entering. Furthermore, bringing people in consumes a certain amount of energy, the source of which is related to the resources stored within the space and Su Yao's own mental strength.

Su Yao explained this information to her family in detail, and the family began discussing how to use this new function. Her father suggested conducting some small-scale trials first to ensure everything went smoothly. So, they decided to let her mother try entering the space first. Her mother took a deep breath, trying to calm herself down. Su Yao held her mother's hand, concentrated, and guided her mother into the space according to the instructions on the runes.

At first, everything went smoothly; Mom's figure began to become transparent, gradually merging into the space. But just as Mom was about to fully enter the space, a violent explosion suddenly erupted outside. It turned out that the thugs who had been repelled earlier, unwilling to accept defeat, had found more powerful weapons and launched another attack on the safe house. This sudden explosion caused Mom's emotions to fluctuate slightly; her body trembled violently at the entrance to the space. Su Yao felt a powerful backlash, as if the space was refusing Mom's entry, and at the same time, her mental energy was being depleted like a tidal wave.

Su Yao was frantic. She called out to her mother, urging her to stay calm. Her father rushed to the door, preparing to defend against the enemy's attack and buy time for Su Yao and her mother. With Su Yao's constant reassurance, her mother finally regained her composure and successfully entered the space. Su Yao breathed a sigh of relief, but she knew the situation was urgent and she couldn't leave her father to face the enemy alone.

She forced her exhausted body to go to her father's side. At that moment, a breach had been blasted in the door of the safe house, and enemies were swarming in through it. Su Yao and her father, back to back, engaged in a desperate fight with the enemy. Su Yao used her spatial storage to retrieve some new weapons and distributed them to her father. They fought as they retreated towards the inner part of the safe house.

During a lull in the battle, Su Yao tried again to use the spatial teleportation function to bring her father in as well. This time, they were more experienced. Despite the ferocity of the enemy's attacks, Su Yao and her father maintained a high degree of coordination. Su Yao focused her mind, while her father quickly adjusted his stance. Just as the enemy was about to pounce, her father's figure successfully merged into the space.

The family was temporarily safe within the space, but they knew the enemy wouldn't give up easily. Moreover, while the space's ability to transport people was powerful, it also had many limitations and risks. They had to quickly devise a way to deal with the enemy and, at the same time, better master this new function to create more possibilities for survival in the apocalypse. Inside the space, Su Yao looked at her tired but determined family and secretly vowed to protect them no matter what.