缉毒总督察李振邦和卧底警员江铭秘密执行追捕毒贩计划，无奈遭遇险境，江铭被迫游走黑白边缘，逐渐失控。为坚守底线，昔日队友互生杀意。猜忌、愤怒、疯狂、失望……全员丧失理智，濒临崩溃边缘！。A cheerleader is imprisoned and made to jump through social media challenges for a seemingly motivated kidnapper - but does he want more than he is telling her?。