The brothers Cole and Taylor were threatened by the gang and shot dead the motorcycle party boss Rodrigo. They were then injured and drove away. Fleeing to an underground parking lot in a park, Taylor bled to death, and Cole called the emergency number for help. Duty ambulance partners Jack Carter and Zoe received orders from the pager and rushed to the parking lot. After finding Cole, they were about to leave, but found that Alonso, Dickon and their girlfriend, who were chasing Cole, were also chasing him. In order to save Cole, Zoe was shot dead by Alonso, and Jack was immediately involved in the whirlpool of murder...