In an abandoned mall, Ellie and Riley scavenged for supplies, their laughter echoing through the desolate corridors. "Think we'll find anything good today?" Riley asked, her eyes scanning for loot. Ellie smirked, "Always do." As they explored, a distant sound alerted them. A third figure emerged from the shadows, wary but curious. "Who's there?" Ellie called out, gripping her switchblade.