Cat is a professional killer falling in love with John, a police investigator. John feels torn between his job, his ex-wife and child, and Cat of course.

When a newly-wed moves in with her new husband's family, she isn't appealed by her mother-in-law Spring because of her childish behavior at the wedding banquet. While having warned her son to be careful with his new bride, Spring concocts a plan to separate the couple and have her son marry her friend, a prim and mature lady.