Sick

Jason and Pamela were a husband-wife pair who orchestrated the entire attack as twisted revenge against Parker. They blamed Parker for their younger son Benji's death from COVID-19, believing Parker infected him. Their elder son was one of the masked intruders who was killed during the attack, making their motive both a grief-driven vendetta and a family retribution.

Benji was Jason and Pamela's younger son. Parker had kissed Benji on Instagram, which DJ confronted her about earlier that night. The couple discovered this connection and concluded that Parker was the one who gave Benji COVID, leading them to target her for revenge.

Tyler Murphy, a college student, was killed in his dorm room by Jason and Pamela's elder son (the first masked intruder). The summary states Tyler Murphy's murder was connected to Parker's alleged role in infecting Benji with COVID. This suggests Tyler may have been related to or connected with Benji, making his death part of the same revenge plot.

DJ was killed because he actively tried to protect Miri when the masked intruder entered her bedroom. Upon waking to the intrusion, DJ rushed to defend Miri, confronting the attacker directly. The intruder overpowered DJ and fatally stabbed him with a metal pike, eliminating the only person actively fighting back against the home invasion.

After Parker incapacitated the second intruder on the highway, a driver stopped to help. When Parker refused to get in the car because the driver was wearing a mask (requiring her to wear one too per COVID protocol), the driver offered her a spare mask. This mask was laced with chloroform, which knocked Parker unconscious. She was then taken back to the lake house by the driver and intruder together.

Yes, when the second masked intruder (one of Jason and Pamela's collaborators) arrived at the lake house, he was dismayed to find his accomplice (the first intruder, who was Jason and Pamela's elder son) already slain by Parker. This reveals the couple knowingly sent their own son as part of the attack, and his death was a consequence of their revenge scheme.

After Jason searched the house for them, Parker and Miri lured him upstairs and threw him over the banister onto a set of deer antlers, killing him instantly. They then fled to a nearby barn to find a vehicle. When Pamela (still alive) attacked them, Miri doused her with gasoline and set her on fire. Pamela collapsed on the road outside as police arrived, ending the threat.

Miri sustained her leg injury when Parker and Miri attempted to escape through the attic. While fleeing from the pursuing intruder, Miri was pushed off the roof by the attacker, causing her leg to shatter upon landing. She managed to crawl away and later crafted a makeshift splint for her broken leg.

After Parker was captured and brought back to the lake house, a COVID-19 test sequence revealed the true nature of the situation. Jason and Pamela used the testing premise as part of their scheme, ultimately revealing their identities and their twisted motive connecting Benji's death to Parker. This sequence unraveled the ruse behind their orchestrated nightmare.

After DJ was killed, Parker and Miri attempted to flee by car but discovered their tires had been slashed by the intruders. Their escape attempt ended in a crash when they hit a tree, forcing them to scramble back toward the house. This trap ensured they remained trapped at the lake house with no means of quick escape.

Parker allowed DJ, her former fling, to stay the night despite the dangerous circumstances because he arrived unexpectedly at the house. Though she was reluctant about mixing an ex with their precarious situation, she felt compelled to let him in since he had nowhere else to go during the pandemic lockdown. His arrival added tension, especially after he confronted Parker about an Instagram post showing her kissing Benji.