在处理完马戏团盗窃案之后，李探长他们马上开车前往城北的永康路。因为有人报案，称清早在永康小区85号楼发现了一连串的血脚印，而且从地下室飘出了煤气味。
zài chǔlǐ wán mǎxìtuán dàoqièàn zhīhòu ，Lǐ tànzhǎng tāmen mǎshàng kāichē qiánwǎng chéngběi de yǒngkānglù 。yīnwèi yǒurén bàoàn ，chēng qīngzǎo zài yǒngkāng xiǎoqū bāshíwǔ hào lóu fāxiàn le yīliánchuàn de xiě jiǎoyìn ，érqiě cóng dìxiàshì piāo chū le méiqì wèi 。
After solving the mystery of the circus burglary, Detective Li and his team drove north to Yongkang Road. Someone had reported that they had discovered a trail of bloody footprints and the smell of gas wafting from the basement of building 85 in the Yongkang housing compound.