Complex sentence: Ellie then goes into the kitchen cabin and tries to find Betsy, but with no luck, she goes outside when Marz appears at the door, chasing her through the cabin until she hides in a refrigerator.
Split into simpler sentences: Ellie then goes into the kitchen cabin and tries to find Betsy. She goes outside, only for Marz to appear at the door and continues to pursuits her in the cabin until she hides in a refrigerator.