Aru otoko

Rie, devestated by a marriage breakup, is chatted up in her (?) store by a total stranger. She falls for him and he for her. She is happily (re)married for 3 odd years, having his daughter, her preteen son likes "dad" as well. One day hubby is killed in an accident. When a relative comes to mourn it's discovered that dead hubby is a complete unknown. She hires a lawyer to solve the mystery. The lawyer is dedicated but has identity problems of his own. (me)